General description Featuring a unique stepped structure, the 6-60mm Step Drill Bit is designed for versatility, allowing you to drill multiple sizes without the need to change bits. It is hard and durable, making it suitable for various metal sheet applications. The drill bit can be used with standard drills and bench drills, and it is recommended to use water injection cooling during operation to extend its lifespan. Technical specifications Drill size: 6, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 mm Material: Metal Color: Silver Recommended drilling speed: 250-400 rpm Measurement allowed error: +/- 1-3 cm Installation Easy to install; no need to replace the drill bit while working. Usage Water injection cooling while working can effectively extend the life of the drill bit. Other information