SPINDLE TAPERED THREADED 1/4" ARBOR HOLE LEFT & RIGHT SET GRINDER BUFFER MOTOR (E 5) TAPERED SPINDLES FOR 1/4" ARBOR SHAFT USE ON 1/4" SHAFT - GRINDER - BUFFER OR MOTOR RIGHT & LEFT HAND - 4-5/16" LONG Tapered Threaded Spindles are Made in the U.S.A. manufactured with close tolerances, runs true without any vibration with optimal performance of wheels and accessories being used. The Arbor/Spindle are used to hold Wheels with 1/8" Pin Hole Centers: Polishing Buffs and Felt Wheels, Satin Finish wheels, Wood Hub Brushes... ONLY NOTE: DO NOT USE Tapered Spindles to hold Grinding Stone Wheels or Hard Heavy Wheel - IT IS EXTREAMLY DANGEROUS TO DO SO! Spindle has a 1/4" arbor hole to work on 1/4" shaft Grinders, Motors or Polishers. The arbors are threaded to be used on the R-RIGHT Side of the motor and L-LEFT Side of the motor. Spindle have a pair of Allen Head Set Screws to attach to your motor shaft. Note: Always slightly tighten the front most set screw and then the one closest to the motor. Final tightness should be done after both are equally tight. JETS Product # 1603-191414 & 291414 FEATURES:  Precision Quality  Machining is done by CNC Equipment  Made of Steel and Anodized Finish  Allen Set Screws do not protrude above the main shaft of the spindle.