Task Tools T22089 Metal/Wood Door Lock Installation Kit with Bimetal Hole Saw Blades and Plastic Template Door lock installation kit for installing lock sets and deadbolts in wood and metal doors Bimetal steel hole saw blades for smooth cutting in hardwood and metal doors 1-handed rack-and-pinion system for securing guide template to the door Works with any door width between 1-3/8-Inch and 1-3/4-Inch