[5 SIZES] There are 6pc different drill bits, including 6mm, 8mm, 10mm, 12mm, 14mm,16mm. overall length: 230mm. You can choose the most suitable wood snake drill for the woodworking. [SOLID MATERIAL]These drill bits is made of high-carbon steel(45# ), which is solid and . And there is no needs to worry that these drill bits will snap or go blunt when you using them. [ACCURATE & HIGH SPEED]The central solid design makes the drill bit stable and strong during the drilling, and the wide blade slot can provide faster drilling, easier chip removal and smoother hole walls. [EASY CARRY] Packed with a plastic case, allows you to carry and store these tools to anywhere. [WIDELY APPLICATION]these bits are perfect for most drilling jobs and materials such as aluminum, wood, plastics pvc and other different materials or your daily drill use. Colour:Black+silver Material:High-carbon steel Size: length 230mm Specification: 6mm/8mm/10mm/12mm/14mm/16mm Package Contents: 6 x drill bits Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.