- Includes collar sizes from 1/8″, 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″ (Bit not included)
- Adjustable collars make setting drilling depths fast, easy and accurate
- Slip the collar onto the drill bit and tighten the set screw to allow you to drill holes to exact depth without guess work
- precision machined and balanced from solid bar stock
- Reamed bore is closed-tolerance controlled








