General description The Makita D-67527 HSS TiN Metal Drill Bit Set includes 19 pieces designed for professional use. The drill bits feature a titanium-nitride coating that minimizes friction, keeping the work area clean and preventing damage or staining. The high-speed steel (HSS) construction makes these bits suitable for both alloyed and non-alloyed steel. Technical specifications 19 pieces in total Includes: two 1.5mm, two 2mm, two 2.5mm, two 3mm, one 3.2mm, one 3.5mm, one 4mm, one 4.5mm, one 5mm, one 5.5mm, one 6mm, one 6.5mm, one 7mm, one 8mm, one 10mm drill bit Other information Comes in an organized carry case for easy storage and transport