M2 HSS Taper Chucking Reamer 5pcs Set, 3/8", 1/2", 9/16", 5/8", 3/4", Fit 3/8" or 1/2" Shank Chuck, Spiral Flute, Bridge/Construction Reamer for Steel, Alloy, Aluminum, Wood, Plastic - Jerax tools, JTTCR902

• [M2 HSS material]: Compared to other commonly used lower grade HSS, M2 has 50% more Tungsten and 150% more Molybdenum, both of which are key elements in improving the durability. [Spiral Flutes & Safety stop]: Left Helix/Right Hand Cut sheers chips away from operator. Safety collar stop to prevent over penetration and operator loss of stability. [Tapered point]: allow entry into overlapping holes. [Application]: enlarge or align existing holes through mild steel, alloys, aluminum, wood, plastic, fiberglass or any similar hardness material prior to rivet or bolt installation. Commonly used in bridge, construction, steel erection/fabrication, and automotive (truck & trailer) industries. Up to 3/8"(10mm) thick mild steel for impact driver or 1" (25mm) thick for Magnetic drill press. Notice: it requires existing hole or a pilot hole would be needed. [Sizes]: 5 pieces, including 3/8" (fit 3/8'' shank chuck), 1/2", 5/8" , 9/16" and 3/4" (fit 1/2'' shank chuck).