Lancaster Pump Metal Stretcher Lower Pressure Block 8" if you use a Gray

if you use a Gray or Black Emery on aluminum

Meets or exceeds the performance requirements of ASTM A780

iron and other ferrous metals

It is also used for cutting with Emery or Tripoli when a Spiral Sewn is too stiff and flexibility is needed

Lancaster Pump Metal Stretcher Lower Pressure Block 8" if you use a GrayLancaster Pump Stretcher Lower Pressure Block These are the original and only units made in the USA by Lancaster Pump. Lancaster Pump holds the original patent for this metal Shrinker Stretcher concept. The Lancaster Pump Stretcher Shrinkers have been copied in China and their poor imitations are not near the quality of ones made in the USA. The Lancaster Jaws are a darker color indicating they are heat treated. The heat treatment process used on