118 2-Flute Jobber Length 4 facet jobber length fractional drills consist of 2 cutting edges with 2 facets per cutting edge. The facets consist of the lip relief and the lip clearance angle. Multi-faceted drill geometries translate into improved centering accuracy, thereby producing rounder, precise holes less likely for "bell-mouthing". Amana Tool's premium-grade carbide substrate insures increased tool life by a minimum factor of 10X's over HSS coated bits, all while often eliminating the need for a prior center punch or spotting procedure. Also good for drill press. Aluminum Aluminum Alloy?10% Aluminum Composite Material (ACM) Aluminum 5052 Brass Bronze Copper Copper Alloys Fomex with Aluminum Face Free Machining Stainless Steels Soft Cast Irons Medium Cast Irons Malleable Cast Irons Magnesium Nickel Alloys Low Carbon Steels Medium Carbon Steels High Tensile (35-45 Rc)?Steels Medium Tensile (45+ Rc)?Steels Soft Titanium Titanium Alloys Hard Titanium
