Inst-A-Matic bed frames are the strongest bed frames made today. Original Wedge-Lock leg construction provides the ultimate in strength and durability. All Queen and King size bed frames feature a Double Rail Center Support with an extra pair of Wedge-Lock legs. Assembles in seconds without tools or adjustments. Side rails simply wedge onto cross rails. Steel sockets are pre-built into legs. The last bed frame you’ll ever need to buy. Supports your mattress warranty.