The piston stays locked when it is fully projected or retracted until the handle is turned. The piston stays locked when it is fully projected or retracted until the handle is turned. Different locating pins can be mounted depending on the workpieces locating holes. The adjustable handle allows for use in confined spaces. The body and piston are made from 1045 alloy steel, heat treated with a black oxide finish. The adjustable handle is zinc die cast.