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Step Drills and Hole Saw Bits Set
RT Studio AI
About
Collection of vintage step drill bits and cone drill illustrations from late 19th to early 20th-century tool catalogs. High-resolution black-and-white technical drawings showcasing classic multi-diameter step drills, conical reamers, taper drill bits, and graduated boring tools with straight, spiral, and helical flutes – designed for hand braces, ratchet braces, and early electric drills. Includes traditional patterns for drilling sheet metal, wood, and thin iron in carriage making, patternmaking, plumbing, and general workshop use before modern Unibits and cone drills became common. Perfect reference for antique tool collectors, blacksmiths, metalworkers, woodworking historians, vintage machinery restorers, and craftsmen seeking authentic stepped drill designs from manufacturers like Irwin, Millers Falls, and Russell Jennings. Ideal resource for identifying, replicating, or understanding historical multi-size hole-boring tools used in pre-1940 workshops.
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