Mounting stud allows for rigid mounting. Attaches to any 7/8", 1", 1-1/4" handlebar. Cup comes with two insulated liners to accommodate many sizes of drink bottles and cups. Easily detachable cup. Large cup holder: Fits Yeti cups, 12-ounce soda can, 16-ounce water bottles, and 20-ounce bottles. It can be used to hold beverages, sunglasses, cell phones, radios, etc. Cup comes with chrome spring clip with rubber drink retainer. Fits: 7/8", 1", and 1-1/4" bars. Fits motorcycles, ATV's, mobility aids, boats, tractors and lawnmowers.