Any Time You Need To Cut A Round Hole, For A Door Knob, Dead Bolt, Etc., This Is The Perfect Saw For You. This Saw Has 7 Blades, Which Will Cut From 1" Up To 2.5". This Saw Includes A 1/4" Shank. Compatible With Most Electric Drills.

* Features 7 blades-all stored in the assembly unit for convenience

* Cuts holes in wooden doors for installation of door knobs and, dead bolt assembly

* Sizes include: 1, 1-1/4, 1-1/2, 1-3/4, 2, 2-1/4, and 2 1/2 inches in diameter

* Unit is pre-mounted on a 1/4 inch shank-compatible with most electric drills

* Be sure to measure before you select your blade size- check package for assembly size