The Sold Secure Gold rated Granit X-Plus 54 borrows many of the features of its mega tough brother & top choice for motorbike security, the Granit Extreme 59. The parabolic 13mm square section shackle is massively resistant to cropping & twisting. It is securely held in place by the Powercell double locking mechanism with the ease of use of the X-Plus locking system (with illuminated key provided).