Built in high tension spring ensures firm locking of drill bits, providing safe and stable operate during use Work with electric wrenches and electric drills, easily converts to electric hammer function for versatile applications in various projects conversion design allows fast switching between tools, saving time and improving work efficiency Simple structural design enables effortless tool change, ideal for urgent task requirements without complicated steps Made from alloy steel for enhanced strength and wear resistance, ensurse long lasting use Wide used for converting electric wrenches / electric drills into electric hammers, Manufacturer: Mekalero