1With 10 sizes drill bits: 3/4/5/6/6/8/10/12/14/16mm, meeting your various needs. 2Very well made, the triangular rod keeps the drill firmly and prevents slipping. 3Reinforced head that prevents bit cracking and provides a longer life, strong toughness. 4It can easily penetrate various materials, such as tiles, concrete, brick, glass, plastic, wood, etc. 5General drill, the drill bit can be installed and used, improve your work efficiency. Item Type: Drill Bit Set Material: Tungsten Carbide Color: As shown in the picture Size: Approx.3mm / 0.12in, 4mm / 0.16in, 5mm / 0.20in, 6mm / 0.24in, 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.39in, 12mm / 0.47in, 14mm / 0.55in, 16mm / 0.63in Weight: Approx.311g/11oz Application: Multi-function triangular bit 10 x Drill Bit1. Please allow 1& 8209;2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.