Features: 1. Good quality steel: the drill bit is made of good quality high-speed steel, the black drill body is made of carbon steel, precision equipment, processing and forging. 2. Smooth chip removal: the spiral chip removal groove design makes chip removal more convenient. 3. Sharp tooth edge: sharp wear-resistant blade, continuous cutting, speed and improve work efficiency. 4. Screw bottle opener: easy to operate with different materials. 5. Material: This twist drill is made of good material, which is durable. Description: With lightweight and portable size, the twist drill bit is easy and convenient to carry and use. Specifications: Size: 6.35*60.3mm, 6.35*62.1mm, 6.35*60.3mm, 6.35*55.8mm, 6.35*7.8mm, 19.8*55.3mm Material: high speed steel Category: countersunk Package Included: 1*12# Twist Drill Bit 1*10# Twist Drill Bit 1*8# Twist Drill Bit 1*6# Twist Drill Bit 1*5# Twist Drill Bit 1*Wrench Notes:1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object.