HHIP wavy parallel for use on precision clamping of parts in drilling, boring, milling, grinding, assembly work, etc. It can readily be used as elastic shims. Thin and fragile workpieces can be secured without damage by utilizing the spring pressure of these parallels. It is made of high quality spring steel, hardened, stress relieved and precision ground. Fitted case. Product specifications: range: 1/2" - 1-1/2" in 1/8" height increments; accuracy: +/-0.0002" in height and Parallelism.