The Benefits of a Center Support System: All beds, especially those queen-sized and larger, will benefit from the center support and bed support slat system. A Center Support supports your foundation unit and mattress in the middle, thus reducing stress on those units. Most mattress manufacturers require center support for their warranty to be valid. Wood bed support slats need center support also: Many beds still use the wood slat method for supporting the mattress/foundation unit. Beds utilizing wood slats for support need added legs in the middle to prevent bowing and cracking of the slats because wood naturally changes over time. The new bedCLAW Unibody Adjustable Height Bed Slat Support Leg: The bedCLAW new leg features strong, one-piece unibody construction. No rivets are employed; it is made from a single piece of steel that has been formed and welded. It will protect both carpet and hard floors. We are constantly working to improve our products and bring even better value to our customers. How Many Should I Install? You may install as few or as many as you prefer. Most customers choose to use 2 or 3 support legs, each installed in the center of a wood slat along the length of the bed. Each bedCLAW Unibody leg comes with 2 adjustable height glides, along with the adjustable extenders providing you the ability to tailor the bedCLAW Unibody support to a wider range of heights when compared to other less useful support legs. The Height Adjustability is continuous from 6-1/2" to 14-3/4", with no missing range. All needed hardware, parts, and screws included make this as easy as 1-2-3. Ships from High Point, NC in the U.S.A. and is backed by a Lifetime Service Policy. Other sellers do not offer such service or product backing. Included Hardware with Each Leg - Wing Nut - Jam Nut (the little one) - Coupler Nut (the big one) - #8-3/4" Phillips Wood Screw (4)