Description: It provides not only shear angle, but also high hook. It is cutting machine that makes clean, chip-free original materials. Solid hard alloy valve body has anti-rebound design. There are 8 sizes for you to choose. It is used for opening holes in wood, plastic, gypsum board. Item Name: Drill Bit Material: Hard Alloy Application: for Opening Holes in Wood, Plastic, Gypsum Board Size Details: 15mm: Total Length: 8.95cm/3.52", Shank Diameter: 0.8cm/0.31", Bit Diameter: 1.5cm/0.6" (Approx.) 20mm: Total Length: 8.95cm/3.52", Shank Diameter: 0.8cm/0.31", Bit Diameter: 2cm/0.8" (Approx.) 25mm: Total Length: 8.95cm/3.52", Shank Diameter: 0.8cm/0.31", Bit Diameter: 2.5cm/1" (Approx.) 30mm: Total Length: 8.95cm/3.52", Shank Diameter: 0.8cm/0.31", Bit Diameter: 3cm/1.2" (Approx.) 35mm: Total Length: 8.95cm/3.52", Shank Diameter: 0.8cm/0.31", Bit Diameter: 3.5cm/1.4" (Approx.) 40mm: Total Length: 8.95cm/3.52", Shank Diameter: 0.8cm/0.31", Bit Diameter: 4cm/1.6" (Approx.) 45mm: Total Length: 8.95cm/3.52", Shank Diameter: 0.8cm/0.31", Bit Diameter: 4.5cm/1.8" (Approx.) 50mm: Total Length: 8.95cm/3.52", Shank Diameter: 0.8cm/0.31", Bit Diameter: 5cm/2" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Drill Bit