Hydraulic Flange Spreader For maintenance, commissioning, shutdowns, testing and valve change outs. No need for hammers, chisels, slings or chain blocks. Integrated wedge concept: friction-free, smooth and parallel wedge movement eliminates flange damage and risk of spreading arm failure. Unique interlocking wedge design No first step bending risk. Requires very small access gap of on 6mm. EFS-14 can be used with a bolting tool-pump or in a set including the spreader, hand pump, hose gauge and adapter