Biesemeyer 78-963 T-Square Anti-Kickback Snap-In Spreader for Delta Contractors Table Saw Designed to reduce dangerous kickbacks, this spreader snaps on instantly and removes easily from Delta and other table saws. T-squares, anti-kickback spreaders Simple installation--snaps on instantly and removes easily Designed to be used with a basket-style blade guard Comes complete with spring-loaded anti-kickback fingers