FOREDOM WHEEL MANDREL STRAIGHT SHAFT SPINDLE for BL BENCH LATHE MOTOR RIGHT HAND - 5/16" ARBOR HOLE This lathe mandrel straight shaft adapter provide more versatility to hold and use various accessories on the Foredom Bench Lathe. Right Side Mandrel (as you face it): Foredom part # A-WM-6 (For current lathes- built in 2002 and later with 5/16" motor shafts) Straight shaft spindle can be used to hold rubber bonded abrasive wheels, grinding stones, sanding drums, brushes and other accessories with 1/4" center mounting holes up to 3/4" thick. Adapter comes with 2 metal washers along with plastic wheel protective shims, and right hand thread tightening nut 1/4" for shaft. SPECIFICATIONS: Mandrel / Spindle: RIGHT Side Mandrel (as you face it) Arbor Hole Size: 5/16" Overall Length: 2-1/2" Shaft Diameter: 1/4" Diameter