Product Name: Holsu 7 Pieces of Total Name in English: Total Tacsh1071 Bi-Meet Hole Set Set 7pcs Country Country: China Manufacturer: Total Product Description: contain 7 pieces used to holes holes in a variety of materials including wood, metal, plastic, glass fiber and cement made of dual metal materials (BI-metal) to provide durability and hardness, allowing fast, effective and long-term tolerance. It features sharp and durable teeth that cut holes easily and accurately. Used to create holes to install handles, locks, taps, lighting devices and more. It comes in a variety of sizes to suit your specific requirements. Provides clean and smooth holes without distorting or tearing the pictured materials technical specifications: sizes 19mm (3/4 "), 22mm (7/8"), 29mm (1-1/8 "), 32mm (1-1/4"), 35mm (1-3/8 ")) the model number tacsh1071