Maxipress R Piston Clamp, 12 in Opening, 6 in Throat Depth, 10,000 N ORS NASCO Polished face and pein Rim tempered face Polished face and pein Rim tempered face minimizes chipping and assures greater safety 7 ft blade standout Mylar® polyester film extends life of entire blade Chrome high impact ABS case is job site tough Secure blade lock won't creep during measurements Corrosion resistant Tru zero end hook for accurate measurements interchangeable easy grip handle Rolled spring steel bar provides maximum pressure held throughout the whole job Fixed jaw surface is grooved to achieve maximum grip Spring activated back brake keeps moving jaw firmly in position Covered double threaded screw doubles both pressure and speed with a greasing hole for optimum lubrication Dismountable