1Cobalt coating reduces friction and operating temperatures and extends its life. 2No need for center punch, not easy to break, can be used for deburring, chamfering and opening 3High wear resistance, high toughness and high strength flexibility 4Made of high speed steel material, durable and long service life 5Widely used for perforating various materials, such as stainless steel tapping steel, wood, thin iron, aluminum alloy, moisture-proof board, PVC board, etc.
