![]() I bought mine at a home show and the guy was sitting there dilling into conrete blocks and pressure treated 4X4 with a 1/4' bit all day long and intentionall pulling the drill to the side to try and overheat the bit. An RPM use chart is included with every set. seems very similar to the Rodman ones that I have, Work rather well. Please note most cordless drills have RPM limitations. Best used in a drill press, but can also be used in a corded drill at a minimum of 2000 rpm. With a rich history spanning over 175 years, Disston Tools is a global manufacturer of hole saws, bandsaw blades, jig saw blades, reciprocating saw blades, drill bits, and other hand and power tool related accessories for the DIY, contractor and industrial markets. These bits work very well with Hammer Drills in masonry products. Reaper Cobalt Stiletto Lefty Drill Bits are made of patented alloy that stands the test of time. Therefore, the torque applied by a left-handed drill bit helps loosen the broken screw. Right-handed fasteners are usually loosened by turning to the left. Ex: Harder metals such as tool steel, run at least 2000 rpm, softer materials require less speed. The most common use of left-handed bits is the removal of broken bolts, studs, and pipe. At last, one bit will do all jobs!īy taking both cutting edges flush with a silicon carbide grinding stone, you can easily put on a new razor edge and drill another 20 holes or so - and repeat! Hole after hole!Ĭontrary to all other bits, this industrial-production cutting tool grinds instead of cuts, and therefore, must be used at a high RPM. The Rodman Blue Bullet will make holes in the hardest steel found, including tool steel, Grade 8 bolts, broken taps & easy outs, stainless and spring steel - even Inconel & AR500, and simultaneously, perform well in brick, block, granite, tile, and most other masonry products. Our patented European alloy consisting of cobalt, tungsten, carbide, and boron is like none other. ![]() Our new Blue Bullet Multipurpose Drill Bit Set is designed for contractors, farmers, locksmiths, and mechanics whose needs only demand certain sizes. Includes most popular sizes 3/16", 1/4", 5/16", 3/8" & 1/2" These bits, run at 2000 rpm or better will drill into a broken tap, busted easy out, frozen set screw as well as concrete, marble, cement, brick, just about any masonry product you can find. The RODMAN BLUE BULLET is the perfect multipurpose set for professionals.
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