SawStop TSA-ODC Over-Arm Dust Collection Assembly Compatible with the 36-inch and 52-inch SawStop Contractor Saws. Fits all SawStop T-Glide rail systems Requires Sawstop Dust Collection Blade Guard. Custom Y-Port unites above and below-table dust collection into one 4 port. (Requires Contractor Saw Dust Collection Panel). Easy and quick installation.