JessEm Fence Stop For Mast-R-Fence II and Rout-R-Fence, JessEm# 04004 Machined from solid aluminum and anodized for durability Anchors in the top T-track on JessEm router table fences Quickly moves into position and locks in place for a positive stop Designed for use with either the JessEm Rout-R-Fence or Mast-R-Fence II Not for use with the original JessEm Mast-R-Fence