15-piece mixed drill bit set Specifications Diameter, metal: 3,0; 4,0; 5,0; 6,0; 8,0mm Diameter, stone: 3,0; 4,0; 5,0; 6,0; 8,0mm Diameter, wood: 3,0; 4,0; 5,0; 6,0; 8,0mm Working length: 30; 40; 45; 50; 65; 33; 43; 52; 57; 75; 30; 40; 50; 60; 80mm Total length: 60; 70; 85; 90; 110; 61; 75; 86; 93; 117; 60; 75; 85; 100; 120mm