A plurality of spaced apart supports are designed to closely support a work piece immediately adjacent the edge being worked, ground or polished. Adjacent shear forced are also eliminated by the use of a polymeric interconnections used to both generally contribute to the spacing and to transmit the vacuum in a distributed manner among the individual support units. The top and bottom surfaces of the supports are dressably machineable in place on the working table to insure that all are brought to exactly the same height to insure even support, and utilize a hardened rubber, or any other suitable machinable material which will not enable the work piece to displace significantly downwardly upon the application of vacuum. The tops and bottoms, as a group, are selectively operable. The ability to periodically dress both ends of the interconnected supports gives the user the power to continually insure that each interconnected support set is within a more exacting vertical tolerance. Further, the machineable ends can be removed and replaced.