This NSK 45° Angle Attachment for the Espert 500 system comes with a ø1/8" Collet Chuck. This NSK attachment is conveniently small and ideal for corner work, and grinding inside cavities and restricted areas.• Reverse rotation against the motor• Speed Reduction Ratio: 3/4• Collet Chuck Standard Size: ø1/8" (CHC-3.175)• Weight : 1.90 oz.• NSK Catalog Number: ES81526Includes:• Collet Chuck ø1/8" (CHC-3.175): 1 pc.• Chuck Wrench (K-231) : 1 pc. • Wrench (20 x 24) : 1 pc. • Standard Accesories (Rubber Pad, Paper Disc): 1 set