General description This Makita HSS TiN Metal Drill Bit Set is ideal for professional use, featuring drill bits with a titanium-nitride coating that minimizes friction and keeps the work area clean. The HSS construction makes these bits suitable for both alloyed and non-alloyed steel. The set comes organized in a convenient carry case for easy storage and transport. Technical specifications Material: High-speed steel (HSS) Coating: Titanium nitride (TiN) Sizes included: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm Point type: 135° Split Point Usage Designed for drilling holes in structural steel (normal and hardened) Suitable for gray and forged cast iron Can be used on various types of plastic Other information Supplied in a convenient plastic case 3 sets included