HEAVY-DUTY BLACKSMITH DRILL BIT: High speed steel with forged construction for strength and durability, made for large diameter drilling. FOR STEEL: Ideal for drilling large holes in steel and structural materials. SLOW SPEED, HIGH TORQUE: Designed for slow-speed, high-torque drilling. Drill a pilot hole first, clamp the work, keep the speed low with firm, steady pressure, and use cutting fluid on steel. SIZE: 40.0mm x 150mm (diameter x overall length), sold as a single bit, with a reduced shank that fits a standard drill chuck. BLACKSMITH OR REDUCED SHANK? Blacksmith drill bits are made for heavier, slow-speed drilling at larger diameters. Reduced shank drill bits suit standard drilling where chuck size is limited.
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