A variant on the classic SeaSucker vacuum mount. The "hinge housing" (the piece that sits on top of the pump) is a whole new way to attach things: the 1/2" wide slot with 1/4" through-hole bolts on to whatever 1/2" thick accessory you want to mount. One side of the through-hole holds a 7/16" nut (for 1/4" bolts) secure so you only need a screwdriver or hex wrench to tighten things down. Here are some items we use the hinge housing for: Monkey Bars ; the Switch Tool Holder ; and the Kitchen Station 2.0 . 4.5" vacuum mount has a pull strength of up to 120 lbs and is chock full of UV inhibitors to give it long life in the great outdoors. Choose Black or White.