Abstract: This invention relates to a system for releaseably securing workpieces to a worktable, including a pressure element and/or a draw element. Both said elements have means for coarse- and fine adjustment. According to the invention the draw element is flexible and consists of a link chain, the coarse adjustment means consists of at least one bracket for engagement with at least one chain link, said bracket having means for direct or indirect engagement with a groove of a worktable and that the fine adjustment means consists of a member wherein a threaded bar may be screwed. Said member and said bar are arranged to be attached to an abutment respectively to a bracket and to said chain.