Lancaster Pump Upper Stretcher Pressure Block 12" Cleco System came from the

Cleco System came from the Aerospace industry

The specially formulated plastic compound is the same one used by eye glass manufacturers to buff the edges of plastic eye glass lenses

Reaches into corners

Fits 5/8" x 11 thread

Lancaster Pump Upper Stretcher Pressure Block 12" Cleco System came from theUpper Stretcher 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 Lancaster jaws