Snap's S75 Bolt-on Spiders in 5 bolt design. Designed to hold standard 110mm bcd chainrings and makes changing rings a Snap!! Made to be reversible, to help get your chain in perfect alignment. Made from 1/4" thick 7075-T651 aluminum plate and comes standard with 19mm spindle hole. Reversible, to help get your ring exactly where you want it. Color: Raw Finish Weight: 1.94 oz.