Two multipurpose featherboards for holding the stock against the guide fence, Easy set-up feature; reduces kickback, binding, lifting, and bent blades, High tech polymer ensures it will maintain its original shape, Advanced design means no marring to your workpiece, Designed for 1/4" T-tracks only. Requires Benchdog 10-012 miter slot adapter for miter slots on routers, shapers, band saws, and table saws.