Use individual collars to mount on the same diameter drills, and tighten screws onto drill body at the desired cutting depth.

Includes

• (1) 1/8in
• (1) 5/32in
• (1) 3/16in
• (1) 1/4in
• (1) 9/32in
• (1) 5/16in
• (1) 11/32in
• (1) 3/8in