Locking benchdogs 3/4 inch.

I was looking for a locking, easy and not (so) expensive to make, no compromise, benchdogs. The idea itself is not new, but the thing, as is right now, checks all my boxes. They will be used to lock in place, solid and precisely, the material to the spoiboard on my CNC.Dimensionwise, they can be considered good for ¾ inches wide, ¾ inches deep holes. What make the thing working is an M5-80 16mm Socket Head Screw and the coresponding Hex nut.Hopefuly, this is the start of a whole family of accesories for the cnc (alligning jigs, hold-downs, measuring and adjusting jigs). Any question, idea, comment…just let me know! Cheers! Laurentiu