Trimax MAX90 Ultra Max-Security 4-1/8" x 10-1/2" U-Shackle Lock with 16mm Shackle Oversized 16 mm hardened steel shackle Multi position bicycle bracket fits frame tubes from 25mm to 38mm Dual cross bolt lock mechanism withstands in excess of 6.5 tons of pull force; Shackle can withstand over 8,000 pounds of expansion force Features one key equipped with a mini flashlight Ideal for motorcycles, bicycles, ATVs and more