【Ideal for Beginners】Universal door latch installation tool requires no prior installation experience and is straightforward to use . Simply align the tool , insert it into the hole , tap gently with a hammer , and clear away the wood waste , suitable for replacing old hardware , installing new doors , or quick home upgrades , ensuring every door lock installation is fast , easy , and seamless 【Anti Splinter Design】Efficient door latch installation kit features hardened steel profile and mortise blades that are incisive and enduring , enabling precise cutting and chiseling of wood fibers . Even when used on hardwood doors , it effectively minimizes splintering , tearing , and rough edges 【Precise and Efficient】Professional latch mortise tool is equipped with an auto centering guide head that fits seamlessly into pre drilled 2.5 cm (1 inch) holes on the side of the door . No manual measurements or guesswork are required , avoiding misalignment and errors 【Universal Fit Design】Practical door latch tool comes with interchangeable square edge and round edge blades to accommodate any standard lock or strike plate . Quickly change blades to fit modern square edge locks and traditional round edge hardware , multiple uses . Compatible with both 1-3/8 inches and 1-3/4 inches thick interior and exterior wood doors , meeting diverse lock installation needs without the need for additional purchases 【Sturdy and Long Lasting】Accurate door latch mortise tool is constructed from heavy , impact resistant rubber and metal , capable of withstanding repeated hammering without cracking or deforming . It is lightweight yet sturdy and long lasting , suitable for DIY enthusiasts , renovation workers , carpenters , and others, Manufacturer: Zhjiutak