... steel, carbide tipped 55pcs Combination Drill Set Contents:-10pcs Hss Twist Drills 1,2,2.5,3,3.5,4,4.5 ... ,5,6,8mm -5pcs Masonry Drills 4,5,6,8,10mm-6pcs Wood Working Drills 3,4,5,6,8,10mm ... -4pcs Flat Wood Drills 13,19,22,25mm -18pcs 25mm Bits: Slotted:3,4, ...