【HIGH QUALITY MATERIAL】High carbon steel material (65#) that quickly and cleanly forms smooth, straight holes in hardwood or cork. 【6 SIZES】There are 6 different diameters of auger drill bits, including 6mm, 8mm, 10mm, 12mm, 14mm,16mm, total length: 230mm/9.05'', to meet your various needs. 【HEXAGONAL SHANK DESIGN 】The unique design allows the hex shank to not slip during operation, and the hex shank can be used with hand drills and drill presses. 【 SELF-DIRECTING WIRE HEAD】The automatic threaded head at the front of the drill bit allows the drill bit to be positioned accurately and quickly on the wood for easy drilling. Center twist drill bit with large and wide blade. The solid center design makes the drill bit stable and sturdy during drilling. The wide blade allows for faster drilling, facilitates chipping, and smooths hole walls. 【DIY ACCESSORY 】High-quality carbon steel auger tips are rust-resistant and durable. HEX SHANK DESIGN The unique design ensures that the hex shank does