Ideal for the re-enactor crafting his own shield, our 14 gauge steel bosses are spun and then polished to remove the spinning marks before being pre-drilled for attachment to the shield. This 7-1/2"" diameter version has a semi-conical cup, allowing more room for gloved hands. Inside diameter of dome is about 5.5". Holes are 1/4". Weighs about 1 pound.