The Master Lock #265D security door bar is made of rugged 20 ga steel construction to resists forced entry through doors and sliding patio doors. The bar adjusts from 27-1/2 in to 42 in 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 can trust. Features Dual function door security bar for hinged and sliding doors Resists forced entry through doors and sliding patio doors Adjusts from 27-1/2 to 42 in to fit most standard doors and sliding patio doors Top piece removes for sliding door application Rugged 20 ga steel construction Pivoting ball joint assures full contact with floor Padded foot provides sure grip without scratching