16pc Drill Set (610289)

6pcs HSS TWIST drills: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm
5pcs wood drills: 4mm, 5mm, 6mm, 8mm, 10mm
6pcs masonry drills: 4mm, 5mm, 6mm, 8mm, 10 mm

Round Handle
CR-V Drill Rod
Material: HSS Steel

High speed steel drill bits
HSS drill bits, an acronym for high speed steel drill bits are extremely hard wearing and particularly well designed for drilling into metal surfaces, as they are much more resistant to the heat generated from the fast speed operation.
Cutting through materials at high speeds is one of the most important advantages of high speed steel. You can enjoy this benefit due to the alloy’s unique combination of hardness, wear resistance and high-temperature capabilities. High speed steel can offer speeds up to seven times that of traditional alloys.

Masonry drill bits can be used with concrete, brick or masonry. This drill bit is ideal for home building and repairs. A masonry drill bit is best used with a hammer drill; some models are designed for use with a rotary drill but they are slightly less effective.