Mitee-Bite? Roto-Vac? Chuck M6 Grippers, 2 Pack. Can Increase The Lateral Load In Some Cases By More Than 400%! Although designed for thin materials & composites, we discovered we could machine more aggressively with use of our newly designed vacuum grippers. The grippers will leave indentations on the backside of your workpiece, however increase the lateral load in some cases by more than 400%! Grippers can be raised/lowered/relocated as needed in the 32 M6 threaded holes on the face. Mitee-Bite? Part #45155