25-Piece HSS Twist Drill Bit Set 1-13mm High Hardness for Stainless Steel Iron Aluminum Wood DIY & Industrial Use

This set of 25-piece high-speed steel twist drill kit includes sizes ranging from 1mm to 13mm and is highly suitable for use with wood and other materials. The precisely ground twist design enables rapid chip removal, smooth drilling, and high precision. It is suitable for woodworking, home maintenance, DIY projects, and industrial processing. It is easy to install and compatible with most standard electric drills. For better results, please use the appropriate cutting speed and coolant when processing metals. This tool set is both practical and economical, suitable for both daily and professional use.Using high-speed steel twist drills: Securely clamp, keep the drill head straight, and match the rotational speed to the material. Position the hole first for precise alignment, feed smoothly, and avoid excessive pressure. Continuously add coolant for cooling and lubrication throughout the process to prevent dry drilling. Slow down the feed when drilling through to prevent the drill bit from breaking or the workpiece from chipping. Clean up the debris after use and store properly.