... Set Material: Hign speed steel, carbide tipped 55pcs Combination Drill Set Contents:-10pcs Hss Twist Drills 1,2,2. ... ,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, ...