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Ratcheting M5 Hold-Down Star Knob
A print-in-place ratcheting star knob for M5 hold-down bolts and studs: a 4.5 mm deep captive hex pocket takes an M5 nut (8 mm across flats) over a 5.5 mm through bore, and an 18-tooth ratchet lets the 69 mm three-lobe handle sweep back and forth in tight spaces instead of needing full turns. The knurled 44 mm top collar stands proud of the handle so you can grip the rotor directly to back the bolt out; overall 69 x 69 x 26 mm, prints as two captured pieces with 0.45 mm clearances.
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