In the case of the drilling component, the holes leads the circuit printing Apply drilling aluminum, fiberglass, circuit, wood, for the sake of acrylic plastic. Is ideal for engineering model, electronics, jewelry making. Color: As shown 10 pieces cutter plastic, wood, metal (for example, aluminum or copper milling, etc.) can be used for. Carbide plant in the range of PCB is designed for accurate CNC milling machine / PCB for milling. Edge processing diameter: about 1.5 mm The edge of the cut length: about 10 mm Rod diameter: about 3.1 mm Length: about 38 mm Blade of tungsten steel, iron soda body Package included: 10 × Plate Gongs Knife Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3 cm.