Mitee-Bite? OK-Vise? Clamp BK2-VT-SO Economy Single Wedge, Smooth Jaws, 5/16-18 Screw, 3,000 lbf Holding Force. When no marks on the workpieces are permitted, smooth jaws are employed. OK-VISE economy models are used in regular workholding when ultraprecision is not required. They are made of the same raw materials as other models, and only the bottom of the jaw is ground for precise positioning on the fixture base. OK-VISE low-profile clamps expand when they are tightened down, simultaneously pressing the workpieces against the guide and preventing their movement. They are designed to take up very little space on the fastening base. Small in size, yet with an excellent clamping force, these clamps guarantee a holding capacity that clearly exceeds the load of machining forces.?Fastening with only one bolt ensures quick set-up times. Mitee-Bite? Part #47103