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The Irwin HSS Pro Drill Bit manufactured from high quality HSS steel. They have precision ground cutting edges for fast drilling and perfect finishing, a ground flute for maximum accuracy and fast chip removal and a universal 118º point shape for drilling a wide selection of materials.The Irwin IRW10502356 HSS Pro Drillbits comes in a bulk pack of 5. Specifications:Drillbit diameter: 12.5mmTotal length: 151mmWorking Length: 101mmAdditional Information:• Tip Diameter (mm): 12.5• Working Length (mm): 101• Overall Length (mm): 151• Pack Qty.: 5