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 five-edged chamfer design allows for efficient chip removal, improving drilling performance. Technical specifications Material: High-speed steel Sizes included: 2.8 x 8mm, 3.0 x 8mm, 3.2 x 8mm, 3.5 x 8mm, 4.0 x 8mm Measurement allowed error: +/- 1-3cm Installation Install and use directly. Usage Ideal for creating countersink holes for flat and plug screws. Improves working efficiency by allowing for quick and accurate drilling. Other information