The quick, easy way to install cylindrical door locks. Jig locates quickly for either 2-3/8 or 2-3/4 backsets. All holes drilled in a single set-up. Adjustable for door thicknesses between 1-5/16 and 2-1/8. Includes strike locator for accurate placement of jamb mortise. Instruction sheet included on kit box lid for easy reference. Lock boring jig, 1 inch boring bit, 2-1/8 boring bit, full-up strike mortiser, latch mortiser, maximum security mortiser, striker locator, quick-change drill adapter, and storage case.