Inst-a-matic? Heavy Duty Bed Frame provides all of the features of the regular Inst-a-matic frame in a ?one size fits all? universal design that fits sizes twin, full, queen, California king and eastern king. The center support bar and 7 legs provide additional strength and includes both rug rollers and glides. Like all other frames in our line, the Inst-a-matic heavy duty is made of heavy duty high carbon, recycled railroad steel with a water-based, lead-free finish. Limited Lifetime Warranty.