A clamp that is meant to act as a coordinate locator for any number of power tools, but most specifically for use with the Biesemeyer T-style table saw fences. The assembly is comprised of a C-frame which offers the ability to enact a clamping action and the ability to enact an indexing action. The design of the assembly allows not only for the clamping of an imprecise reference point along a table saw fence rail, but also the fine adjustment of indexing a screw against the table saw fence.