Double Ends Twist Drill Bits

About the Rock® SPECIALIZED Double Ends Twist Drill Bits: 
 
This twist drill bits set has wide applications and powerful functions. The hard material provides it with quick drilling speed, and the spiral chip space has good chip removal ability. With all-grinding technology, the surface is smooth, the blade is sharp, strong and durable. 135-degree split-point design makes this bit easy for location and prevents walking. Made of high-speed steel, this drill bit set is durable and strong. It is suitable for drilling or punching stainless steel, iron, aluminium, copper, rolled steel, etc.