Drill through the toughest materials with ease with these high-quality masonry drill bits The Draper 18551 drill bit set allows you to drill through the toughest masonry with ease. This kit contains 12 titanium nitride coated high-speed steel drill bits which are ideal for drilling through a range of materials and 5 tungsten steel drill bits suitable for drilling masonry. This multi-purpose set contains a variety of sizes for all applications. Features: A handy drill bit set containing 12 titanium nitride coated high-speed steel multi-purpose drill bits and 5 tungsten steel masonry drill bits  These bits are all of exceptionally high quality for the toughest drilling tasks Feature a straight shank for use in many power drills Sold in a handy soft grip case Contains: 12 x Titanium nitride coated HSS drills: 1.5, 2, 2.5, 3, 3.2, 3.5, 4, 4.5, 4.8, 5, 5.5, 6mm 5 x Masonry drills: 3, 5, 6, 8, 10mm Specification: Shank type: Straight Pack Qty: 17 piece