Check the listing for details. Carbon-Steel Hole Saw Drill Bit Door Knob Lock Installation Kit Tool Accessory. Color: Original version, Condition: New. Listed at 12.39 USD. Durable Material: Carbon steel made hole saws and arbor, reinforced plastics guide templatePackage Includes: 1 PC U-type adjustable plastic guide template, 2 PCS 1”(25 mm) and 2-1/8”(54 mm) hole saws, 1 PC arbor with drill bit. Depth of saw blade is 50 mmFor Daily Use: Designed to fit the most common lock sizes in daily use and works well with wood doors. The adjustable plastic guide template fits 1-3/8-inch and 1-3/4-inch thick doors, fits 2-3/8-inch and 2-3/4-inch backsetsEasy Lockset Installation: The adjustable guide template for easy and exact drilling with snap-lock arms for selecting door width and backset. Complete installation in 4 easy stepsEasier to Use: Specially shaped desigh, large chip-clearance slots, easy plug removal