If you have a Makita chuck get this , fits perfectly .
Makita P-51954 4 Piece Quick Change Drill & Countersink Bit Set 1/4 Hex Maklok
22 novembre 2016
great little kit
These are good except I found the grub screw so tight on the drill bit that the allen key simply rounded off and I had to find another . so either grub screw not so tight [the drill bit has a flat side also] or a harder allen key ?.