Hager Full Mortise, Five Knuckle, Ball Bearing Hinge BB1279 4.5" x 4.5" US3, Hager Companies, Mfr#: 1279B00450045300

features: full mortise five knuckle ball bearing standard weight hinge steel with steel pin (ansi a8112) non-rising removable pin with button tip two ball bearings 5" x 5" and 4.5" x 4.5" bb1279 available with two different leaf sizes 3.5" x 3.5" bb1279 available with reversible hole pattern for use on medium weight doors or doors requiring medium frequency service