The Master Lock 265D Security Door Bar is made of rugged 20 gauge steel construction to resists forced entry through doors and sliding patio doors. The bar adjusts from 27-1/2in (70cm) - 42in (1.1m) for application flexibility. The pivoting ball joint assures full contact with floor, and padded foot provides sure grip without scratching. The Limited Lifetime Warranty provides peace of mind from a brand you know and can trust.