ABUS Granit Power 58/140HBIII Heavy Duty U-Lock - High Security Motorcycle Bike Lock with Double Locking System (Security Level 18, 100mm Shackle) - Ideal for Street Parking, Commuting & Theft Protection

This is the finest of all padlocks. This is one solid lock , with a shroud around the shackle to prevent bolt cutters. Very heavy. I use a 1/2 inch square chain for my e-bike with this lock and don't worry anymore. Very Satisfied.