Mild & Structural Steel. 6-piece set with 2 depth. · Sizes range from 9/16 to 1. · 3/4 Weldon shank for secure fit. · Includes handy storage case OSCARBIDE Annular Cutter 7/16 inch Cutting Diameter,1 inch Depth of Cut,3/4 inch Weldon Shank 2 Flat Mag Drill Bit with Pilot Pin for Magnetic Drill Press,1 Piece Cutter Set Tool | 13Pcs Annular Cutter 7/16 To 1-1/16 Blade Annular Cutting Tool Set 1 Depth Mag Drill Cutter For Metal 1-1/4 Inch Mag Drill Bit OSCARBIDE 1-1/4 Inch Annular Cutter - 2 Inch Cut Depth, 3/4 Weldon Shank Mag Drill Bit With Pilot Pin Metal Drilling Cutter Annular Cutter 7/16 Inch These annular cutters are suitable for working with both ferrous and non-ferrous metals,cast iron, stainless steel, aluminum, copper, and plastic,wood, in either plate or pipe form. Hey metalworkers, this OSCARBIDE annular cutter is an absolute game-changer for drilling clean holes fast! The 7/16 diameter with 1 cutting depth and 3/4 Weldon shank with 2 flats fits most magnetic drills like MagDrill, Hougen, and Milwaukee OSCARBIDE annular Bit fits most standard magnetic drills and machine tools such as mills and large drill presses with tool holders. Annular Cutter Size :7/16”Cutting Diameter,1Cutting Depth, 3/4” Weldon Shank with 2 Flat,Pilot Piin Size: 6., 34x77mm.