This NSK attachment for Electer Emax and Rotus systems has a rubberized grip for better control. The resistance provided by cutting and grinding is absorbed by a special rubber grip to eliminate slipping. Note: When using the HG-200 with a Rotus system you must use a Speed Reducer. Maximum Allowable Speed: 25,000rpm Max (Intermittent Use) • Weight : 7.41 oz. • Chuck is tightened with a wrench. • Collet Chuck Standard Size : ø1/4" (CHG-6.35) • NSK Catalog Number: RE10188 Included Equipment: • Collet Chuck ø1/4" (CHG-6.35): 1 pc. • Wrench (10 x 10) RA10406 : 1 pc. • Bar Wrench (K-212) : 1 pc. • Pin Wrench (K-233) : 1 pc.