Overview Reviews Product Description Cobalt prentice drills offer increased hardness, toughness and better wear resistance compared to regular HSS Gold oxide surface finish provides a polished finish and prevents chip building, galling and welding on a workpiece 135° Degree split point for fast penetration and accurate starting (self-centering) which eliminates "walking" and reduces the thrust force needed 1/2" Standard reduced shank to expand the size range capacity of 1/2" drill chucks Ideal for harder steels, heat treated and high temperature alloys, and stainless Clarkson Osborn Catalog Product Videos Custom Field Diameter 1-9/64" Flute length 3" Overall length 6" Shank diameter 1/2" Package quantity/sold as each 1 Product Reviews Write a Review Write a Review × Clarkson-Osborn 1-9/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51109 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *
Clarkson-Osborn | sku: CLK DR51039 39/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51039 MSRP: Now: $56.80 Add to Cart Clarkson-Osborn | sku: CLK DR51037 37/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51037 MSRP: Now: $56.80 Add to Cart Clarkson-Osborn | sku: CLK DR51045 45/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51045 MSRP: Now: $62.91 Add to Cart Clarkson-Osborn | sku: CLK DR51049 49/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51049 MSRP: Now: $72.20 Add to Cart
Clarkson-Osborn | sku: CLK DR51037 37/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51037 MSRP: Now: $56.80 Add to Cart Clarkson-Osborn | sku: CLK DR51045 45/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51045 MSRP: Now: $62.91 Add to Cart Clarkson-Osborn | sku: CLK DR51049 49/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51049 MSRP: Now: $72.20 Add to Cart
Clarkson-Osborn | sku: CLK DR51045 45/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51045 MSRP: Now: $62.91 Add to Cart Clarkson-Osborn | sku: CLK DR51049 49/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51049 MSRP: Now: $72.20 Add to Cart
Clarkson-Osborn | sku: CLK DR51049 49/64" x 1/2" Reduced Shank Cobalt Prentice Drill Bit DR51049 MSRP: Now: $72.20 Add to Cart