BESSEY SLV150M - 60" Double force all-steel variable clamps (SLV/GSV)Double Force Clamp, 60 Inch Capacity, 4 3 4 Inch Throat Depth The modular concept of the "Double Force" clamping system allows for an incredibly wide range of applications. There are 2 different rail cross sections available, SLV models are 27 x 13 mm (1 1 16" x 1 2"); the GSV model has a 30 x 15 mm (1 3 16" x 5 8") profile for high clamping forces. Clamping widths range from 16 to 118 In. The rail end slide stops can be removed without tools. This