【Kit Includes】- 1 U-shaped plastic guide template, 2 hole saws (1 inch and 2-1/8 inch)/(25 mm and 54 mm) and 1 bar with drill bit. Saw blade depth is 50 mm. 【Professional Quality】- Our hole saws and bar are made of durable carbon steel, while our guide templates are reinforced with sturdy plastic. These professional-grade tools are designed to provide you with reliable performance and long-lasting quality. 【Easy Standard Installation】- With the adjustable guide template, lock installation becomes a breeze. The snap-on lock arm makes it easy to select the correct door width and back setting for precise drilling. Follow 4 simple steps and complete the installation process in no time. 【Adjustable Design】- Fits the most common lock sizes in daily life and is perfectly compatible with wooden doors. The adjustable plastic guide template accommodates door thicknesses ranging from 1-3/8’’ to 1-3/4’’ (35mm-43mm), and either 2-3/8’’ (60mm) or 2-3/4’’ (70mm) backsets.