Product information：
Cooling type (internal cooling / external cooling) ： External cooling
Texture of material ： high speed steel
Model ： 5 sets 4, 5, 6, 8, 10, 7 sets 3, 4, 5, 6, 8, 10, 12, 5 sets 6, 6, 8, 10, 12
Series ： Ceramic tile glass

Packing list: 

triangular drill * 1