is secured firmly the vise is mounted on a vertical stem 6 itself made integral with a bench or table by virtue of a clamp or another device not shown device 10 of the invention includes a trough 12 mounted horizontally on a support 14 16 18 in this case forming a bracket the support vertical section includes two stems sliding 14 in the other 16 a knob 161 with a screw provides the means of tightening the stem 14 and immobilizing it at the desired height with respect to the stem 16 the lower part of the stem 16 has a sleeve 162 able to slide on a horizontal beam 18 having a square section a knob with a screw 163 passing through the sleeve makes it possible to lock it onto the beam 18 the latter has a sleeve 182 mounted to slide on the stem 6 supporting the vise 1 a knob 183 with a screw is used for immobilizing the beam 18 in rotation and in vertical movement a stopping sleeve 19 adjustable for height is used as a downward stop for sleeve 182 trough 12 is mounted at the end of stem 14 which is in two parts 141 and 142 the upper part 142 can swivel about a horizontal axis formed by the knob 143 which is tightened to retain the two elements 141 and 142 together in this way it is possible to immobilize the trough in any position around the axis 143.