General description 5 PCS Countersink Drill Bit Set is designed for wood drilling, featuring high-speed heat-treated steel construction for enhanced durability and wear resistance. This versatile set includes five different sizes, making it suitable for various wood hole drilling tasks. The unique three-pointed design allows for quick and accurate drilling, ensuring smooth holes without skidding. Technical specifications Material: High-speed steel Sizes: 2.8 x 8mm, 3.0 x 8mm, 3.2 x 8mm, 3.5 x 8mm, 4.0 x 8mm Package Contents: 5 x Countersink Drill Bit Measurement allowed error: +/- 1-3cm Usage To use the countersink drill bits, simply install them in your drill and proceed with drilling. The five-edged chamfer design helps to quickly discharge chips from the hole, improving drilling efficiency and preventing debris accumulation.