Rockler Woodworking 450 Miter Sled for Table Saw: These miter saw accessories help give you perfect miters every single time, no adjustments needed! Simply cut one piece on the leading face, one on the trailing face, and voila! Since both pieces reference off a perfect 90-degree angle, the miters will fit perfectly. Our 45 degree Rockler miter sled is high-impact polycarbonate which ensures durability and low-friction sliding. --- Adjusting Miter Track Fit: Use a 7/64" hex wrench (not included) to advance the nylon set screws in the Rockler 45 degree miter head bar until you achieve a smooth, no-slop fit in your saw’s miter track. --- What’s Included? Rockler 45 Degree Miter Sled – The Perfect Accessories For Table Saws --- Tech Specifications For Table Saw Accessories Woodworking: Our woodworking tools and accessories fits standard 3/8" x 3/4" miter slot - Measures: 5-1/2" W X 10-3/8" L - Clamping Faces Measure: 7-1/2" L