This set of various dust collection adapters is designed for use in your workshop. It allows you to connect a 4" dust collector hose to various tools such as a Ridgid R45171 table saw, Ridgid R4331 planer, a Tradesman planer and Shop Vac fixed extension. The adapters also come with a 96mm coupling for a Ridgid oscillating spindle sander and a small Shop Vac hose , both of which were added in March 2020.