Forrest STIF06-1 6-Inch Size 1-Inch Arbor Circular Saw Blade Stiffener - Dampener No splinters cross-cutting oak, ply veneers and melamine Cuts in all directions- rip, cross-cut, miter, any depth. Cuts all sized grooves 1/4" through 29/32" increments. (Set of plastic adjusting shims also included) Super-hard carbide gives up to 300% longer life, especially good on plywoods and abrasive particle-boards. Are hardened and precision ground flat within .001" to keep your blade true.