All PSM thumbs are built with all T-1 steel; they are CNC machined and are fully line bored, the heavy duty cylinders have induction hardened chrome plated rods, deceleration cushions at both ends, and dual bushings for better pin support. Our progressive link thumbs have dual links to give a greater range of travel and are available with maximum rotation to follow the bucket thru full rotation. Progressive links eliminate thumb body twist and give even gripping power. Our thumbs aggressive design stores compactly and grips effectively.
