0134010331 Blade wrench Compatible with Ryobi 10" Table Saws: BTS21, BTS16, BTS211, RTS31,Table Saw Wrench fits for Ridgid R45171, R45171NS, R45171T ,R4513, R4516, R451 models and others.
134010331 Table Saw Wrench overall length 7.4 inches, width 1.6 inches, The open end of this wrench is 21 mm wide. lets you remove or install the table saw blade.