【Kit Includes】- 1 U-type plastic guide template, 2 hole saws (1″ and 2-1/8″)/(25mm and 54mm), and 1 arbor with drill bit. Saw blade depth is 50mm. 【Pro Quality】- Our hole saws and arbor are crafted from durable carbon steel, while our guide template is reinforced with sturdy plastics. These professional-grade tools are designed to provide you with reliable performance and lasting quality. 【Easy standard installation】- With the adjustable guide template, lockset installation becomes a breeze. The snap-lock arms make it simple to select the correct door width and backset for precise drilling. Follow the 4 easy steps to complete the installation process in no time. 【Adjustable design】- Fit the most common lock sizes in daily life and is perfectly compatible with wooden doors. The adjustable plastic guide template accommodates doors with thicknesses ranging from 1-3/8’’ to 1-3/4’’ (35mm-43mm), and backsets of either 2-3/8’’(60mm) or 2-3/4’’ (70mm). 【Quality Service Guarantee】We provide you with satisfactory after-sales guarantee. If you have any questions or dissatisfaction with our products, please feel free to contact us and we will do our best to solve your problem.