Adjustable collars make drilling fast, easy and accurate.
Slip the collar onto the drill bit and tighten the locking set screw to allow you to drill holes to exact depth without guesswork.
This metric set of seven steel collars is for 3, 4, 5, 6, 8, 10 and 12mm diameter bits. Can be used on brad-point or twist drills.
Grub screws can be set on the bit web or shank.