12 titanium nitride coated high speed steel straight shank drills and five tungsten steel masonry drills in handy set. 5 x Masonry drills: 3.0 5.0 6.0 8.0 10mm. 12 x Titanium nitride coated HSS drills: 1.5 2.0 2.5 3.0 3.2 3.5 4.0 4.5 4.8 5.0 5.5 6.0mm.