Mitee-Bite? 4 Pack Pitbull? Wear Plates For Pitbull Clamps? With 3/8-16 & M10 Screws. This shim provides a hard barrier between Pitbull? Clamp and fixture, preventing distortion of back wall when using aluminum or mild steel fixtures. Simple solution to keep fixtures light, maintain full clamp travel and holding forces at max pressure. Refurbish old fixtures or add to existing aluminum fixtures to maximize machining capabilities. When using the wear plate, increase the depth of your fixture pocket by .025\