Product Review

* Material: YG Cemented Carbide + Chrome Vanadium Steel
* Drills clean, accurate holes in these thin materials: sheet metal, ducts, steel, copper, brass, aluminum, plastic, wood, veneers, vinyl siding, plasterboard, PVC, stainless steel and cast iron.
* Ideal for drilling in tough metal, including heavy-duty abrasive alloy and hardened steel.
* In the process of opening holes to continue to add water for cooling.
* Size: 3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm 13.5mm 14mm 15mm.
* Twist drill bits for fine-detail drilling with the cutting power of diamond

* Package include:
* 13pcs Tungsten Steel Cemented Carbide Twist Drill Bit