The Koblenz TWIST-N-LOCK 1-1/4 inch diameter x 6 ft wet-dry-blow vacuum hose locks into position by simply inserting the hose and twists to lock into place. Competitive wet-dry use a "friction fit", which means that the wet-dry vac hose slides right in and utilizes friction between the parts to hold the hose in place. This hose is good quality and a perfect replacement for shorter or worn-out hoses. Its 1-1/4 inch diameter will accommodate all 1-1/4 inch related accessories.