Our unique design allows you to easily adjust the tension on the center pivot point: from very slow movement of the plank for early training and confidence building, to normal competition speed specified by AKC regulations. The aluminum pivot pipe rests between blocks of smooth, space-age plastic, and four handles allow you to quickly and easily adjust the tension of the blocks. Our base is welded steel for stability and long-lasting service, with a durable, powder-coat paint. We offer either the full obstacle with 1-piece aluminum plank and non-slip painted wooden surface, or just the base and center pivot pipe with welded straps for attaching your own wooden plank (including bolts & instructions to attach your plank to the center pivot). Choose from a See-Saw Plank with a 42" contact zone or one with a 36" zone. Designed to meet AKC agility regulations.