1、TUNGSTEN CARBIDE: Woodworking hinge hole drilling boring bit is made of premium carbide material, which is strong and durable with long service life. 2、EASY TO USE: Woodworking hinge hole drill bit is easy to install and use, high cutting accuracy, low noise, no burr, and wide range of application. 3、ADJUSTABLE DEPTH: Tungsten carbide wood hole saw auger opener can be adjusted to different effective depths to meet more usage requirements. 4、APPLICABLE OBJECTS: Tungsten carbide wood hole drill bit can be used for opening holes in various solid wood sealing boards, hardwood boards, solid wood products, plastic plywood and other materials. 5、5 PIECES SET: Tungsten carbide woodworking hinge hole drill bit has 5 hole openers, 15mm, 20mm, 25mm, 30mm, 35mm, you can choose to use according to your needs. Item Type: Woodworking Hinge Hole Drilling Boring Bit Product Material: Tungsten Carbide Product Weight: Approx. 0.36kg/12.7oz Product Size: Approx. 16x12x4.5cm / 6.3x4.7x1.8in Use: Applicable to various solid wood sealing board, hardwood board, solid wood products, plastic plywood and other materials opening Size: 15mm/0.6in, 20mm/0.8in, 25mm/1.0in, 30mm/1.2in, 35mm/1.4in 1 x 15mm Hole Drill Bit 1 x 20mm Hole Drill Bit 1 x 25mm Hole Drill Bit 1 x 30mm Hole Drill Bit 1 x 35mm Hole Drill Bit 2 x Hex Wrench All data are measured manually, and there are certain errors in the measurement results.