Irwin IRW10502394 HSS Pro Drill Bit 8.5mm OL:117mm WL:75mm 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: 8.5 x 117mm. PVC Tube.