An angle bracket formed of a block of material. It has an elongated upper arm member formed adjacent the top end of a connecting member and an elongated lower arm member connected to the bottom end of the connecting member. The rear surface of the respective arm members make a 90 degree angle with each other. The top surface of the respective arm members have a swivel pad recess and a plurality of locking channels extend radially outwardly therefrom for receiving the arm of a clamp. An alternative embodiment angle bracket is capable of adjustable angles. It has an L-shaped upper clamp arm that is pivotally connected to an L-shaped lower clamp arm. Each of these arms have a V-shaped support clamp portion formed at their free end.