●Combination drill set with HSS metal drill and carbide drill bit for stone ●Twist drill bit set with 5 x HSS drill bits in diameters: 3, 4, 5, 6, 8 mm and 4 x carbide drills with a diameter of: 4, 5, 6, 8 mm ●Metal and masonry drill cassette, suitable for alloyed and unalloyed steel, grey cast iron, non-ferrous metals, hard plastics as well as stone, masonry, brick etc. ●HSS metal drill bits are rolled and steam tempered - the masonry drill bits have a carbide tip ●Ideal drill set for household, hobby workshop or do-it-yourself DIY enthusiasts (item number: 420200)