Each of the Blair Rotabroach Master Kits are an all-in-one set containing 16 different sizes of Rotabroach Cutters for drilling holes in materials up to 1/4" thick. The fractional kit includes cutters from 1/4" to 3/4", and the metric kit includes sizes from 6mm to 20mm.Rotabroach annular cutters are ideal for use in metal fabrication, restoration, maintenance and electrical applications, spotweld removal, plugs holes for welding, and automotive aftermarket installations.
Each kit is packaged in a sturdy plastic storage case and includes an arbor assembly, extra pilots, center punch, washers and instructions on use. Rotabroach Cutters can be used in handheld electric drills with 3/8" chucks and in drill presses.
Rotabroach Cutters are made of M2 H.S.S., hardened and precision ground. The annular or hollow design cuts only at the periphery of the hole, leaving the center as a solid slug of material. Because there is no center point or "dead zone" as with conventional hole making tools, the annular cutter configuration has demonstrated the ability to drill holes up to three times faster and last 10 times longer than twist drills or hole saws. The cutters cut holes that are virtually burr-free and do not deform the surrounding material, even thin sheet metal.
Made in the USA.
