r/whatisthisthing • • Mar 23 '26

Announcement The r/TraceAnObject subreddit exists to identify objects to help solve child abuse cases. New cases from Europol were posted recently. Please see if you can help.

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172 Upvotes

r/whatisthisthing • • 9h ago

Solved! small brass object, less than 1/2", the four holes go all the way through, small protrusion does not move or spin, found on apartment floor while vacuuming

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279 Upvotes

r/whatisthisthing • • 6h ago

Black plastic box strapped to a stop sign, wrapped with a bike chain, pointed at a four way intersection

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77 Upvotes

Sorry I couldn’t get more photos, was in a rush! Can post more if requested later today! Not sure what this is, but the little tube sticking out on the left looked like it had a lens on the end. It’s pointing at a four way stop sign outside my apartment complex. Is it a camera? Looks super jank. Stressed out about any cameras with all the flock stuff happening recently. For extra context, this shares a street with turning point USA


r/whatisthisthing • • 2h ago

Solved! 9-inch tube with a captive brass piston, a spring running the interior length of the tube, and a stud on the other end with two flats.

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23 Upvotes

I got this item as part of a lot of firearm parts and gunsmithing tools at an estate sale. The owner was a machinist and also a gunsmith. He had barrels for shotguns, M1903A3s, an M1 Garand, a Ruger 10/22, and a Colt M11911A1. He was also a reloader. The tube is exactly 9 inches long; the small diameter is approx. 9/16" and the flared ends are about 11/16". The internal diameter of the brass cup is just under 7/16". I cannot find any manufacturer stamps or proof marks. The holes go all the way through. The piston/plunger is spring-loaded with a spring that travels the length of the tube. The spring tension is weak. The "rear" stud is about 1 1/16" and has two flats on the tip. Please, what is this thing?


r/whatisthisthing • • 12h ago

Solved! 2.5-inch solid plastic black spindle/key/plug with notches in the junk drawer

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131 Upvotes

I moved a few months ago and found this in my junk drawer. Unfortunately, I can't recall what it's from. I also am unable to remember if it was in the junk drawer at my previous apartment or if it found its way there during the packing/unpacking process.

I've included images with measurements. The entire piece is about 2.5" long. The bottom (~7/8") is wider than the top (~3/4").

Reverse image searches mostly suggest it's a film spool, but I'm not convinced.


r/whatisthisthing • • 1d ago

Open Small white pellet about 1/2 inch and sandy gritty texture

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288 Upvotes

I heard a whizzing sound and this landed on my roof. Didn't sound like a bottle rocket, much quieter. Google image searched but wasn't able to find an answer. Closest thing was a mosquito dunk but this is much smaller.


r/whatisthisthing • • 21h ago

Solved! Small light grey plastic cylinder, ring at one side, smaller than 1 cm, found near sofa

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34 Upvotes

r/whatisthisthing • • 1d ago

Solved! What is this two-piece metal device?

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129 Upvotes

We just moved house and these were in plastic so they’ve never been used. Google searches come up blank.


r/whatisthisthing • • 1d ago

Solved! Metal post with handles that pivots with two stainless steel hooks, outside, Scotland.

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136 Upvotes

r/whatisthisthing • • 2d ago

Solved ! Translucent acrylic, squares, and floral shapes

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679 Upvotes

My husband and I just found these in my mother-in-law‘s basement. Some of them have limited attached like a makeshift Hanger. There are about 100 of them. You can see the full selection here. There are no grooves on the sides. They are 2 1/2 inches across.


r/whatisthisthing • • 2d ago

Open Solid 11 inch long steel rod with cylindrical head that has a hole in it

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516 Upvotes

Found this metal rod while we were camping at a drive in car camping site... it's about 11 inches long and looks like a little hammer, but has a hole on the hammer head part.


r/whatisthisthing • • 2d ago

Solved! Strange utility vehicle spotted in a driveway in the UK. Some sort of truck with an elevated container thing on the back.

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301 Upvotes

r/whatisthisthing • • 2d ago

Solved! Metal. Black. About 12” long with a hole in one end.

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98 Upvotes

Live with 2 kids. Maybe from a game? Also a gardener and an electrician in the house.


r/whatisthisthing • • 3d ago

Solved! Chili pepper with two slots in one side and one on the other

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7.1k Upvotes

Comes with napkin rings, candle holder, salt and pepper but I just can’t figure this one out.


r/whatisthisthing • • 3d ago

Solved! Another peculiar item from the recycling bin. Once again I believe this to be titanium. There are three connection pins on the bottom. Google image search has many wild ideas, none of which seem to be right. It is 2.5” wide and 3” tall.

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726 Upvotes

1st image: Top

2nd image: bottom.

The other pictures show the sides. I believe it was thrown away due to the nick circled in photo 5. One friend of mine suggested it may be some sort of fuel injector.


r/whatisthisthing • • 3d ago

Open V-Shaped bracket / clamp device with moving parts at the top

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68 Upvotes

Found this at an estate sale. There weren't a lot of specialized tools or hardware at the sale, and this was in the attic separate from the tools that were there.

It stands about 18" tall and the sides of the V are about 6" long. It seems base and rod might have been added to the clamp piece and aren't part of the original design.

The clamp piece is precision engineered. The only moving part is the spring mounted clip on each side. They are under moderate tension and lift about 1/16" enough to get some kind of band or strap through. There is a machined line near where the z-shaped piece lifts up, almost as if something is supposed to be cut, folded, or pinched there.

Google image search and ChatGPT haven't produced any concrete results.

Any help would be appreciated!


r/whatisthisthing • • 4d ago

Solved! HDP item, 5.5” tall from base to top of metal caps. Id estimate it to be around 1 or 1.5 lbs. Found in recycling bin.

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628 Upvotes

The silver caps have an (anodized?) metal rod with a sharp point which I assume is for taking a sample of something. The gold coloured one is simply a nub. One size says o while the other says n. The side where the gold nub goes does not say anything, and the rods will not fit into it as that hole is slightly shorter. Google image search has yielded no results. I assume this is some sort of lab testing equipment.


r/whatisthisthing • • 4d ago

Solved! Small metal part found on the floor of my kitchen. It is about an inch long, decently weighty. It is metal but does not stick to a magnet, the end is not threaded

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468 Upvotes

r/whatisthisthing • • 4d ago

About 3 ft. The mouth opens wide and has 4 teeth. There is only one handle. It was my grandpas so probably some kind of old farm equipment

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115 Upvotes

r/whatisthisthing • • 3d ago

Open What is this palm sized, light weight, silver metallic plastic electronic i found at goodwill (all i have is a sketch)

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0 Upvotes

i found this at goodwill earlier today with nothing nearby that seemed related, it fit in my hand so maybe like 3 or 4 inches??? it was thicker at the back and tapered, had a small antenna with visible copper inside. and a crescent shaped groove on top that looked purely aesthetic, no buttons knobs screens speaker grilles NOTHING, the left is what it looked like from the back and the right is a top view


r/whatisthisthing • • 5d ago

Solved! What is this little box with a chevron pattern on my kitchen wall above the pantry in my 1950s-ish apartment building?

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1.3k Upvotes

I live in an older apartment building and this little box/wall attachment has been heavily painted over above the pantry? I’ve lived here 5 years and I suddenly cannot rest until I know lol. It’s about two inches tall. There is nothing behind it on the other side of the wall. I removed a bit of the paint with acetone and it seems to be metal? sounds kind of hollow? I might just have to buy some paint stripper and uncover all of it if I can’t figure it out! Thanks a bunch!


r/whatisthisthing • • 5d ago

Solved ! What is this plastic object that my neighbour found in his house? It measures 7” long and 5” across.

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282 Upvotes

As in title: my neighbour found this piece of plastic in his house, it measures 7” long and 5” across.

Any ideas are very welcome.


r/whatisthisthing • • 6d ago

Solved ! what is this chain on the side of a building; the abrasions indicate the chain has spun 360° often enough to wear a pattern? maybe?

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1.9k Upvotes

this is like 20 feet off the ground. just noticed it for the first time today despite walking by it often


r/whatisthisthing • • 6d ago

What is this black metal thingy? Found in a bathroom floor

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101 Upvotes

What in heavens is this thing I founded on the floor of an abandoned apartment bathroom


r/whatisthisthing • • 7d ago

Solved! 16mm heavy brass cylinder with black rubber plug in one end and rectangular slot in side

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79 Upvotes

Found digging in an old flower bed in the North of England. Some sort of dashpot/thermostat/spring cartridge? The remains of the rubber plug are to the left in the photo, it had bulged and split. Doesn't seem to be anything under the plug except a flat metal surface. Part of a ballcock, perhaps? Found amongst pieces of porcelain that may possibly have been rubble from an outhouse.