These soft, durable, plastic pads provide a resilient, protective cushion when clamping wood, metal and plastic surfaces. Non-mar, non-stick, non-slip pads eliminate blocks and can be adjusted and removed quickly, if desired.Recommended for use with PONY Style Nos. 50 and 52 Clamp Fixtures, JORGENSEN E-Z HOLD II Style No 3400 Steel Bar Clamps and all JORGENSEN fixed-head design bar clamps ( with minor trimming, if desired )