Drillco 29 piece heavy-duty jobber drill set. Web construction is heavier than general purpose construction making it particularly suitable for cotter pin hole drilling and cross hole drilling in heads of bolts. The heavy construction affords efficient drilling in stainless steel and other hard materials. The split point reduces the thrust requirements and minimizes walking. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge. Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging.
What's in the Box?: 29 Drill Pal mechanics length drill bits ranging in size from 1/16" to 1/2" in 1/64" increments