1/2 Inch Quick Change Speed Arbor, Mandrel. Fits 1-1/4 through 6-Inch Hole Saws. Rugged Steel Construction with 2 Locking Pins. Outstanding Design and Performance Exclusively From Cz Garden * PREMIUM 1/2-INCH HEX SHANK MANDREL perfectly fits bi-metal hole saws with 1-1/4 inch through 6 inch. Super fast to attach to speed all your jobs. Get more done in less time. * PIN DRIVE Positive Lock with Quick Change. This is the preferred design used by professionals and demanding DIYers. Durable steel construction with precision crafting makes this the best you can buy. * INCLUDES BONUS 1/4 inch HSS Pilot Drill. Just what you need to get perfect results with less effort every time. Enjoy more successful outcomes without all the headaches and wasted time found with lesser tools. * SET SCREW IN ALLOY-STEEL BODY for replacement of Pilot Drill. Works smoothly every time without worry of rusting or corrosion slowing or sticking the operation. Available ONLY from Cz Garden Supply - Trademark, USPTO, and Amazon Brand Registry Protected. * 100% MONEY BACK GUARANTEE ensures this will quickly become your favorite no-risk purchase. Many people are stocking up with several of these to keep in all their tool boxes and work areas. HURRY AND BUY NOW! Makes a great birthday present, holiday gift, or anniversary gift. Also wonderful for friends, family, and co-workers.