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30° helix with roll relief and precise corner radius: The angled flute geometry reduces cutting forces
Geometry: Spiral flute design that aids chip evacuation and reduces binding in deep or through-hole applications
Shape & grip: Hexagon design for secure handling and precise alignment during threading
maintain part quality
99mm designation identifies its exact size for consistent results across jobs—from sheet metal to brackets—making it a versatile choice for professionals and hobbyists alike
Dormer Pramet A147 7.70 mm HSS E JOBBER DRILL DIN 338 ISO Insert - DC Style 30° helix with roll reliefThe Dormer Pramet A147 7. 70 mm HSS E Jobber Drill (DIN 338) is a versatile high speed steel drill built for reliable performance across common workshop materials. Designed for both hand held and machine use, it delivers precise starts and consistent hole quality in steel, aluminium, and stainless steel, making it a dependable choice for engineers, technicians, and DIY enthusiasts alike. 130 Split Point for Self Centering: The precision tip starts
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