Extruded aluminum channel attaches to high tunnel frames, baseboards, and hipboards. Bends readily over hoops and has a machined groove to center drill bits or self-drilling tek screws when attaching. Preformed stainless-steel Poly Latch Wire securely locks high tunnel covers into the channel by snapping over the covering and into the channel to quickly secure greenhouse film, shade cloth, etc. Holds its shape, even with repeated use. Conveniently tensions greenhouse film as wire is installed. Safety glasses or goggles are highly recommended. Pieces sold individually. 1 Unit = 1 eight-foot section. NOTE: Poly Latch Wire sold separately. See part #7040.