A device for holding and locking objects, for example workpieces or tools, - with a support rack structured according to the type of a mesh structure created from wire strands aligned parallel to and at a distance from one another, by means of which at least one rectangular holding opening is created, in which the wire strands running parallel to one another are arranged on one plane (5, 6) each and in which the distance (a) of the wire strands in the upper plane determines the edge length of the longer edges of the holding opening and the distance (b) of the wire strands of the lower plane determines the edge length of the shorter edges of the holding opening, - and with at least one connection body featuring a lengthways axis, on one face end of which connection body a retaining socket aligned flush with the lengthways axis is provided, in which case the retaining socket can be inserted into one of the holding openings of the support rack and on the other face end of which there are attached one or more retaining or holding elements by means of which the objects can be fixed onto the connection body and the support rack characterized in that, - the retaining socket in the direction of the lengthways axis comprises a cylinder, a clamping element and a fixing plate, - the cylinder is directly attached to the connection body and its diameter corresponds to the edge length (a) of the longer edges of the holding opening, - the clamping element is provided adjacent to the cylinder, in which case one contact surface or two contact surfaces is/are formed onto the outside of the clamping element, which when installed is/are aligned in parallel to the wire strands of the lower plane and their distance from the opposite edge of the holding opening in each case corresponds to the edge length (b) of the shorter edge of the holding opening, - the fixing plate is provided adjacent to the clamping element, in which case the external contour of the fixing plate is adapted to the internal contour of the holding opening of the support rack, - and that the fixing plate projects with two opposite face ends beyond the corresponding contact surface of the clamping element and the cylinder projects beyond the two face ends of the fixing plate running at right angles to this. - with a support rack structured according to the type of a mesh structure created from wire strands aligned parallel to and at a distance from one another, by means of which at least one rectangular holding opening is created, in which the wire strands running parallel to one another are arranged on one plane (5, 6) each and in which the distance (a) of the wire strands in the upper plane determines the edge length of the longer edges of the holding opening and the distance (b) of the wire strands of the lower plane determines the edge length of the shorter edges of the holding opening, - and with at least one connection body featuring a lengthways axis, on one face end of which connection body a retaining socket aligned flush with the lengthways axis is provided, in which case the retaining socket can be inserted into one of the holding openings of the support rack and on the other face end of which there are attached one or more retaining or holding elements by means of which the objects can be fixed onto the connection body and the support rack - the retaining socket in the direction of the lengthways axis comprises a cylinder, a clamping element and a fixing plate, - the cylinder is directly attached to the connection body and its diameter corresponds to the edge length (a) of the longer edges of the holding opening, - the clamping element is provided adjacent to the cylinder, in which case one contact surface or two contact surfaces is/are formed onto the outside of the clamping element, which when installed is/are aligned in parallel to the wire strands of the lower plane and their distance from the opposite edge of the holding opening in each case corresponds to the edge length (b) of the shorter edge of the holding opening, - the fixing plate is provided adjacent to the clamping element, in which case the external contour of the fixing plate is adapted to the internal contour of the holding opening of the support rack, - and that the fixing plate projects with two opposite face ends beyond the corresponding contact surface of the clamping element and the cylinder projects beyond the two face ends of the fixing plate running at right angles to this.