TC Bros 1 Springer Risers TC Bros Classic Risers are engineered for precision with a 1 diameter opening to accommodate a wide range of bars. Crafted from 6061-T6 billet aluminum using CNC machining, they offer durability and a stylish upgrade to almost any bike featuring an aftermarket springer front end. Features: CNC machined from 6061-T6 billet aluminum Minimalist design is slim and classic Black is powder coated while Stainless is hand polished 5/16 18 t.p.i. stainless socket head hardware provides secure clamping power 1/2 20 socket head mounting bolts included for perfect fit to Aftermarket springer front ends Subtle branding on underside of riser is hidden once installed