2pc 1/8"-Shank Mandrel Set - For 1/8" & 1/4" Wheel Disc Arbor Holes - Fits Dremel Essential accessory set for Dremel and other power rotary tools; hardened steel with nickel finish Provide sturdy mounting base for sanding, buffing or cut-off wheels & discs, saw blades Small size has 1/8" screw with 5/16" base & cap, overall length 1-3/4", 1/8" shank Large has 1/4" diameter x 3/8" length screw w/ 7/16" base/cap; 1/8" shank; length overall and 2" Sold in pairs of one 1/8" & one 1/4" mandrel with screws & fiber washer