Bici U-Lock Bike Bicycle Bracket Heavy Duty 15mm Anti-Rust Anti-Saw w/ Mounting Bracket & 2 Keys Durable 15mm Diameter Steel Shackle Resists Cutting Weather Guard Feature to Keep Weathering Elements Out of the Lock Includes Universal Mounting Bracket for Easy Mounting to Any Frame Tubing U-Bar Size 5.5" x 8.25" Includes Two (2) Pre-Cut Keys