Features a 15M USB power supply design for continuous operations without charging worries, ideal for prolonged use in various scenarios like jewelry making and crafting Equipped with a 135 degree high hardness angled that 50% more durability than standard , ensuring precise and effortless drilling on multiple materials The metal chucks nut provides secure grip for drill bits, enabling quick bit changes without slippage, enhancing efficiency for detailed work Operates at 5-6V with recommended 2V+ current for consistent during delicate tasks like pearl drilling and antique restoration, minimizing interruptions Perfect for drilling pearls, wood, metal, epoxy resin, and more, meeting the needs of craft enthusiasts and professionals in jewelry making and repair projects