The shank diamater: 3/8"(9.5mm)
Made of High Quality HSS (High-Speed Steel) To Ensure Longevity Allowing For Heavy Use Without Dulling.
Perfect For The Kreg Manual Pocket Hole Jig System
For High RPM Corded Drills, Large Bit Diameter Allows For Excellent Flat Bottom Holes And Smooth Walled Cuts
A Perfect DIY Small Pocket Jig For Use With A F Clamp Or C Clamp And Drill Bits (3/8" Bit Included) To Create Those Perfect Woodworking Holes To Create Or Repair Wood Joints
 
Specification:
Material: HSS
Shank type: round shank
Inner diameter of positioning ring: 9.5mm
Shank diameter of drill: 9.5mm
Full length: approx. 160mm
Color: as picture shows
 
Features:
Used for wood hole punching&positioning, aluminum punching, thin metal punching, etc.
Open out two holes one-time, sharp and high hardness.
Positioning the depth freely, easy and relaxing while processing.
Rustproof, durable, convenient to maintain.

Instructions:
Adapts the height of drill;
Clips the plank;
Put the drill into the hole to reach the plank;
Pull the drill 5mm higher, remember not to against the plank while starting the drill;
Switch on the drill to reach 500 rotating speed, 1500 rotating speed is the best;
Slowly at the first, quicken the rotating speed when the drill head has been drilled into half or full.

Package included:
1 x Twist Step Drill Bit
1 x Stop Collar
1 x Wrench