Fits bicycle frame tubing from 25mm to 80mm whether the cross-section is round, oval, triangular or square * Pre-stretched seatbelt style material contours to the shape of the bicycle frame providing constant contact with the tube while in transit * One-bolt design "snugs" the bracket to the bike frame; allows for adjustment without removing the bracket completely * Provides the ability to micro-adjust the lock angle in 15 degree increments to better fit and align with a bike"s specific geometry * Fits all Kryptonite U-locks as well as other brands with 13mm and 16mm round shaped shackles