Hand forged from 18 gauge mild steel with a shiny metal finish, this knee cop provides superior protection without any sacrifice of mobility or flexibility. Based on late 15th century Gothic designs, a 6-inch wide heart-shaped projection known as a leaf provides protection for the side of the knee from lateral blows as well as the front. Reliable leather straps and clasps help to secure the armor in place. Also known as a poleyn (this term was typically used more with pieces that provided additional protection just above and just below the knee). Construction: 18 Gauge mild steel Diameter: 8 Inches Face Height: 4 Inches Leaf Height: 6 Inches.