Superstud 160 and 190 provide excellent grip thanks to 3/4 welded u-studs. Case hardened, micro alloy boron steel gives high wear resistance. Superstud 160 is a 5/8 chain and is available in a variety of diamond pattern options. Superstud 190 is a 3/4 chain and is available in double and triple pattern options. Made in Finland. Sold in pairs.