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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. Manufactured to DIN 338 standards.Irwin HSS Pro Drill Bit. Size: 2.5 x 57mm.PVC Tube.Additional Information:• Tip Diameter (mm): 2.5• Working Length (mm): 30• Overall Length (mm): 57• Pack Qty.: 3