Aluminum. With a ball end lever. Semi un-polished stone washed cast finish. For 1" handlebars. 3/8" medium cable hole. Small in-house productions make these sand-cast products true handmade pieces of art with a not-so-everyday-design ready to spark your imagination. / Fitment: 41-64 FL (brake); 41-67 FL (clutch); 54-72 XL Sportster (brake) (NU) and custom applications with 1"/25,4 mm handlebars