Multi-surface combi drill bit set for use on metal, plastic and wood. Includes 6 x HSS drill bits: 2, 3, 4, 5, 6 and 8mm, TCT masonry drill bits: 4, 5, 6, 8 and 10mm, and 5 wood boring drill bits: 4, 5, 6, 8 and 10mm.Multi-surface combi drill bit setFor use on metal, plastic & wood6 x HSS drill bits: 2, 3, 4, 5, 6 & 8mm5 x TCT masonry drill bits: 4, 5, 6, 8 & 10mm5 x wood boring drill bits: 4, 5, 6, 8 & 10mm