Ergonomic Design : The handle is ergonomically designed for a natural and comfortable grip , effectively reducing hand fatigue . The non slip texture on the surface ensures that the blade does not slip when exerting force , enhancing operational safety Precise and Efficient : The guide head automatically aligns itself with the 1 inch door edge holes , ensuring precise positioning with every working without offset or misalignment . Provides a stable cutting template to help you quickly complete standard size lock slot grooving work , dramatically improving work efficiency Widely Used : The product can be adapted to standard door panels of 1.75 inch or 1.375 inch thickness , which meets the needs of most domestic and commercial door lock installation Premium Material : The blades are made of great impact resistant material with extreme hardness and wear resistance , able to withstand repeated cuts without deforming or dulling . Designed to replace traditional hand chisels , it ensures a consistent depth of cut every time for a seamless fit installation of door lock panels Cutting Excellence : The blade is built with special heat treatment process , with acute edges and precise cutting , suitable for softwood and hardwood materials . Good durability , even after long time use can still maintain excellent cutting performance , reduce the trouble of frequent replacement of the blade, Manufacturer: Sutowe