Uni-Butt Custom machined 27 inch diagonal from butt to ferrule Black Color with Gold Locks ID for insertion and Glueing of your rod blank into the collet /ferrule is 0.84 inches Heavy duty 30-100 lb These are good quality Unibutts compared to Aftco (TM) bent butts . Aftco unibutts are around 1.25 inches in diameter on main body these are slightly larger at 1.34 inches diameter. They will NOT interchange with Aftco butts . In my opinion the quality is every bit as good as major name brands. Really nice bent butts .