These investment-cast, mild steel tabs harken an earlier era of cast and forged lugs brazed to factory frames. They are coped for 1" tubing, though there is enough material to open up the coped end for larger tubing. The 1/4" through-hole can be used as-is with nut and bolt for universal mounting, or drilled and tapped for 5/16" or 3/8" hardware. Sold per pair.