I've not been a fan of how most D-Locks attach to bikes: often they're hard to get in or out, or they rattle, ir they're just not secure. But the EaZyKF attachment is really exciting. The twin-bolt clamp will fix to any frame tube up to 36mm diameter. The spring loaded clamp for the lock can be rotated on this base to fix the angle it's mounted at. Then finally, you can rotate the matching sleeve on the lock to adjust that angle, too - ideal for tucking into tight spaces.