This shield boss or umbo comes in 14g iron making it fully functional and ready for battle. To mount your boss there are six pre-drilled holes and included is mounting hardware. The back side has a glossy black finish. The front features antique brass plating. You can usually find shield bosses on round shields round because one makes a punching motion towards an oncoming blow which can?t be done with other shields. Umbos are great at deflecting or taking the brunt of the blows. This boss would make a great addition to any Viking shield you are creating. Shield bosses are usually made of thick metal but could also be made of wood. The boss was originally designed to deflect blows from the centre of round shields, though they also provided a place to mount the shield's grip. As time went on and heater shields with curved bodies became more popular, and enarmes superseded the bar grip, the boss became more of an ornamental piece Additional Details ------------------------------ Bullet point: This Round Iron Shield Boss is perfect piece to mount on your own rounded shields. This shield boss consists of a circular sheet of metal with a round, raised bubble at the center that helps to deflect blows away, while also featuring six holes around the edge for mounting. Product description: This shield boss or umbo comes in 14g iron making it fully functional and ready for battle. To mount your boss there are six pre-drilled holes and included is mounting hardware. The back side has a glossy black finish. The front features antique brass plating. You can usually find shield bosses on round shields round because one makes a punching motion towards an oncoming blow which can?t be done with other shields. Umbos are great at deflecting or taking the brunt of the blows. This boss would make a great addition to any Viking shield you are creating. Shield bosses are usually made of thick metal but could also be made of wood. The boss was originally designed to deflect blows from the centre of round shields, though they also provided a place to mount the shield's grip. As time went on and heater shields with curved bodies became more popular, and enarmes superseded the bar grip, the boss became more of an ornamental piece