Features: 1.Multiple Sizes Countersink Drill Bit: The countersink drill bit set is machined from high speed steel and come in 6 most popular sizes : 6,8,9,12,16,19mm, which will meet your daily needs. 2.High Speed Steel Countersink Drill Bit: The countersink drill bit is made of High-Speed Steel with Titanium Coating, and 82-degree tips for drilling into wood, soft metals, rubber, plastic, mild steel, dont work on stainless. 3.Constructed with high-speed steel and coated with super-hard titanium, this bit has the durability to withstand high-heat conditions for lasting use 4.Quick change Hex shank fits all handheld and stationary drills as well as the power drivers, Countersink ideal for Wooden planks,Fiberboard,Particle board,Plywood,Plastic,Aluminum Board ,Pcb Board etc 5.After-sales Service: If you have any problem, please contact us immediately, we will help you solve it as soon as possible. Specifications: Size:6-19mm Weight:125g includes: 1 x Chamferer