Billy Allen bits are one of our absolute favorite bits! This one is new with tags from Weaver Tack’s Performance line. 5″ mouth, 6.75″ shanks that are a bit straighter, but still offering good pre-signal, almost in an Argentine style. This one has a center roller, with a thicker diameter mouth, with copper inlays. Billy Allen mouths are more mullen in nature, with a roller, that offers quite a bit of stability while still having some pick up. This one is new with tags.