a spring 36 the spring 36 applies clamping force via the pad 32 to the work piece 4 the counter bore 27 may be counter bored into the bottom 18 of each clamp bar 22 a suitable distance so that when the clamp bars 22 are held in place near the work piece 4 the springs 36 apply the desired amount of pressure to the work piece 4 via the pad 32 a slippery or cushioning pad 33 may be used to cushion or prevent the scratching of the work piece 4 by the spring loaded pad 32 in a preferred embodiment the pad 33 may be teflon u00ae the pad 33 may be mounted to its backing disc 34 utilizing flush mounted fasteners not shown including for example counter sunk machine screws threaded into the metal backing disc 34 the pads 32 are suitably round but may be any desired shape the backing disc 34 for the pad 33 may have a hole at its center tapered to accept the head of the flathead machine screw 35 the machine screw 35 fits through the backing disc 34 forming a surface that is flush or flat permitting the pad 33 to be installed over the backing disc 34.