IRWIN Tools Bi-Metal Door Lock Installation Kit (3111002) Bi-Metal Door Lock Installation Kit For Metal & Wood Doors This product is highly durable This product is manufactured in China. Bi-Metal hole saws for metal and wood doors Fits all interior and exterior doors Self centering jig fits all common door widths Adjustable for both 2-3/8-Inch and 2-3/4-Inch backsets Includes bolt plate template and router bit