★Features ・This screw clamp is for all-purpose use, such as raising and lowering, lateral (horizontal) pulling and turning-over lifting. ・Adequacy of tightening can be visually confirmed by secure and safety structure. Phosphorescent (glow-in-the dark) paint for easy recognition. ・This clamp is equipped with a screw cam(spherical universal designed), which provides an extra powerful clamping force on the work piece at no load and even when vibrations occur during operation. ・The clamping force increases in proportion to the weight of the load.