Features: The taper countersunk bit is made of excellent steel and high speed steel material, exquisite workmanship, long lasting The taper countersunk bit has good chip removal effect, strong bending strength and wear , stable and reliable The cone countersunk bit will quickly discharge the cuttings in the hole, which can effectively prevent the retention of cuttings and improve the drilling efficiency Countersunk chamfered bit with adjustable limits to meet a variety of countersunk and drilling requirements. A total of 5 color, one color corresponds to one drill size, easy to distinguish Wood countersink drill bit can be used for drilling wood, plastic, soft metal, fiberboard, aluminum alloy screws and other materials, simple and practical Specifications: Component:Metal Bit: 2.8/3/3.2/3.5/4mm Package Includes: 5Pcs Countersink Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.