Anet A6 easy-going wing nut replacement

Easy-going wing nut replacement for hot bed. This design needs to embed a 3mm threaded nut, using a wooden piece and a hammer. You can tighten the bolts and springs both screwing the device using your fingers or helping you out with a 2.5mm allen wrench,as you can see on the pictures.

Tests: I checked the back ones just in case they hit the frame. At the outer position, they are close but don't hit it. They shouldn't hit any other parts as they measure the same as a wing nut.

I've just ma