4.5mm Diameter Jobber Length Carbide Twist Drill, 118? Split Point, AlTiN Coated, 41mm Flute, 70mm OAL 41mm Flute Length,4.5mm Shank,70mm OAL GWS/Monster jobber length twist drills are made from C-2 Sub-Micron Grain Carbide With 10% Cobalt Content. 25? helix angle quickly evacuates chips and allows for increased feed rates. 118? split point for quick penetration without walking. The most versatile overall length lends this geometry to a multitude of uses. Optional AlTiN coating can increase feed rates by 40%. Made in the USA. GWS/Monster Tool Part #450-401772B