HELD IN PLACE BY TWO 3 INCH VELCRO STRAPS. EACH STRAP HAS A HOLDING POWER OF 2700 LBS. A SAFETY STRAP WITH 'D' RING GOES UP THROUGH THE HANGING BRACKET FOUND ON ALL CANS. IF FOR SOME REASON THE HOLDING STRAPS ARE TORN OPEN THE SAFETY STRAP HOLDS THE CAN FROM FALLING OUT. AS YOU CAN SEE THE CAN HARNESS CAN BE CARRIED HORIZONTALLY IN ONE HAND BY THE CENTER VERTICAL STRAP. CAN BE USED ON ALL EXTINGUISHERS.