Feature: 1. DOUBLE BEARING: The lock hole opener is designed with double bearings, and double sliding rails can ensure more stable operation and accurate punching. 2. QUICK LOCKING: 4 limit rings are used to locate the opening length, and the length is quickly locked according to the lock head width, convenient to use. 3. DUSTPROOF COVER: The silicone dust cover can effectively prevent dust from entering the bearing, avoid jamming, and buffer the impact of the slider on the limit ring. 4. EASY TO ADJUST: The slide rail of the bearing seat can be adjusted left and right at will, the open design makes the operation space larger, flexible and reliable. 5. WORKING RANGE: The clamping thickness is 3.5-10cm, and the tapping depth is 13cm, commonly used for the installation and replacement of home room lock. Specification: Item Type: Lock Hole Opener Kit Material: Tungsten Steel, Silicone Maximum Lock Body Distance: Approx. 240mm / 9.4in Clamping Thickness: Approx. 3.5-10cm / 1.4-3.9in Maximum Processing Length: Approx. 43cm / 16.9in Opening Depth: Approx. 13cm / 5.1in Bit Tool Specification: M10 x 18mm, M10 x 22mm, M10 x 24mm Purpose: Self installation and replacement of room lock. Package List: 1 x Lock Opener Body1 x Lock Mortise3 x M10 Bit Tool1 x Accessory1 x Bearing1 x Stop Ring2 x Wrenches4 x Wing Screws1 x Ruler1 x Wood Chisel1 x Plastic Suitcase1 x Storage Box Note: Be careful when using.