16ga 316L Stainless Steel Post Channel Bracket for 4″x4″ dimensional lumber. The overall dimensions are 3-1/2″H x 3-5/8″ID x 3-1/2″H. The width of strap is 3-1/4″. There is a 3/4″ diameter hole center of the bottom of bracket. Both sides of brackets have one 5/8″ diameter hole and three 3/16″ diameter nail hole. The PCB44-PP (Pro Package) includes one 1/2″ x 4 1/2″ 316 stainless bolt, one 1/2″ x 3 3/4″ 316 stainless wedge anchor, nuts, and washers.