I wanted to mount some cables to my Prusa MINI's Z alu profile using something reusable - that's how this rachet was born. The "T-nut ratchet for 30 mm alu extrusion profile.stl" contains a pocket for an M3 nut. You can fix it with a 15 mm M3 bolt. I have iterated a simplier version with an M4 hole to use it with a proper T-nut. Link to the design: https://myhub.autodesk360.com/ue282d3d0/shares/public/SH56a43QTfd62c1cd9685643e0a1951e2bb3 Update #20200211 - new features: - t-nut turns only one way - ejector hole for the M3 nut - countersunk slot for the M3 bolt - more room for the hex key / screwdriver - extra teeth for tighter lock - smaller and 60° teeth for easier operation - left side of the rachet will not overhang on the 30x30 profile hence allows easier installation even if something is already installed on the side of the profile https://youtu.be/bvUciTL83wk Blogpost about the design process (sorry folks, Hungarian only): https://fns.pappito.com/2020/02/11/3d-nyomtatas-a-dagadt-csirke/