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Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
A spool that winds loose ratchet straps and tie-downs into a tidy coil instead of a tangled ball: thread the strap tail through the two 3.6 mm slots in the drum and spin it. The 88 mm flanges and 54 mm clear drum take a 2 in (50 mm) strap, the Ø16 mm spindle has a 6.7 mm across-flats socket for a 1/4 in hex bit so a cordless drill does the winding, and an 8.3 mm cross hole takes an 8 mm rod or screwdriver shank as a hand crank.
⚠ Flagged: lifting or tensioned load. Not for safety-critical use without independent engineering review.
A split collar that clamps onto a standard 1/2" NPT shower arm (21.3 mm OD pipe) with one M4 screw into a heat-set insert, carrying two 30 mm upturned J-hooks for a loofah, razor strap or bottle handle — no suction cups, no drilling tile. Collar bore is 21.8 mm, ring wall 3.5 mm, overall 60 x 38 x 18 mm; slide it on with the shower head removed, then pinch the 3 mm gap closed to lock it.
A U-bracket that slips over a cabinet door (fits panels up to 19.5 mm thick) and turns the inside face into a grocery-bag trash caddy — the bag handles drop into a 9 mm trough behind an upturned lip so they can't slide off. 50 mm wide with two optional screw holes for a permanent mount.
A no-screw C-clamp that slides onto a desk edge or shelf and hangs your headphones underneath on a wide 30 mm saddle. The wedged inner jaw self-tightens on tops from 20–30 mm thick, and the 14 mm hook mouth also takes a bag or lanyard.