Exquisite and durable: The triangular drill bit is made of quality alloy. with high hardness and sharp drilling. not easy to damage or break Wear-resistant triangle drill bit provides smooth chip removal. durability and long life Non-slip triangle grip design ensures firm operation and no slipping while drilling Multi-size specifications: drill set includes 4pcs 6mm (1/ 4 inch). 2 pieces 8 mm (5/16 inch). 2 pieces 10 mm (3/8 inch). 2 pieces 12 mm (1/2 inch)). a total of 10 pieces of punch drill bits. to meet your needs applicable equipment: electric drill. bench drill Wide range of applications: The strong tip of the hand drill is powerful and easy to drill. suitable for steel. to copper. stainless steel. to iron. aluminum. with ceramic tiles. in the woods. to plastic. in the glass. to the stick. at the brick wall. in cement. etc . These triangular drill bits can meet the needs of handwork. maintenance. DIY. etc. Eye-catching design: The glossy appearance makes the triangular drill more delicate and beautiful. which is convenient for you to find The multi-functional drill bit with the appropriate size design is easy to store. does not take up space. and is also easy to put in the tool bag and carry Quality drill bits: the quality triangular handle multifunctional drill bits can easily penetrate various materials. easy to locate. stable drilling. fast speed. no damage to boundaries and neat openings The practical drill kit is a nice gift for your friends who love crafts