The POWERTEC 4-Inch Double Threaded Blast Gate quickly, easily and securely connects to your 4-Inch hoses and fittings without the need for hose clamps. Both ends of this innovative device are threaded to ensure both easy installation and an airtight grip; just screw piping onto threaded ports. In addition, this versatile device features a handy sliding gate for simple and effective cleaning action. Lastly, a locking knob ensures that the gate is secured in its optimum position. This convenient accessory helps maintain your dust collection system at its peak performing capacity. Maximize efficiency and minimize hassle with the POWERTEC 4-Inch Threaded Blast Gate; this essential dust collection accessory comes in handy every time!