Description Overview Compact design allows for placement of the blades very close to the back of the presser foot. Easy in-plant installation. Blades guarded by a metal housing for operator safety. Double acting cylinder assures long life, power and speed. Specifications Each air unit supplied complete with filter/lubricator, knee switch, air hose and fittings. Compatible for automatic operation with special electronic control box and fiber optic scanner. Condition and Support We stock all replacement parts.