This 4" to 2.5" Dust Collection Reducer Adapter makes it easy to connect a 4" tool port to any 2.5" shop vacuum hose using a durable ABS connector and a flexible 4" rubber cuff that forms an airtight seal. The integrated cuff compensates for minor port variations to maintain strong suction, while the included stainless steel hose clamp ensures a secure hold during high‑vibration use. Designed for fast, tool‑free installation, this reducer is ideal for moving between table saws, planers, jointers, sanders, CNC machines, and other 4" dust collection equipment.