This is the a set of drill bit hole , which is made from Alloy for durable use, it can cut holes efficiently, help you to do your great work. Suitable for cutting holes in a variety of materials including steel, brass, wood, plastic, etc. Featutres - ColorAssorted Color - Material: Metal - Size: About 0.9x0.9x12.5cm - Made from materials for safe and durable use. - groove design provides faster, smoother and cleaner cuts each step. - Compact size is erasy to storage and carry. - Anti design make it firmly bit the hole, not easy to out. - Perfect for using to cut holes in a variety of materials including steel, brass, wood, aluminium copper, fibreglass and plastic etc. Package list: 7 x hole drill