【HIGH QUALITY MATERIAL】Quickly and cleanly drills smooth, straight holes in hardwood or cork. 【7 SIZES】There are 6 different diameters of auger drill bits, including 6mm, 8mm, 10mm, 12mm, 14mm,16mm, 18mm, total length: 230mm/9.05'', to meet your various needs. 【SDS HANDLE DESIGN】The unique design ensures that the shank will not slip during operation, and the SDS shank can be used with hand drills and drill presses. 【SELF-DIRECTING THREAD HEAD】The automatic threaded head on 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 with a wide, wide blade. The solid center design makes the drill stable and sturdy during the drilling process. The wide blade allows for faster drilling, easier chipping, and smooths hole walls. 【DIY ACCESSORY】The auger tips made of high-quality carbon steel are rust-resistant and durable.