This model of Global Door Controls is considered as a ball bearing full mortise commercial door hinge. It's highly recommended for use on aluminum frame storefront doors. Moreover, it's advised for medium to heavy weight doors. This type sized 4.5 x 4 in. comes with 5/32 in. radius in its corner, bundled with a fixed pin. Item is available in two finishes: Stainless Steel and Oil Rubbed Bronze.