Most insurance companies require a "Sold Secure" rated lock for your bike, if valued over £1000 then Gold rated is required. (check your insurance company's requirements)
The Etook ET600 U lock is Gold rated at a security level 6
Traction Resistance
13x13mm Shackle
Special Hardened steel
Corrosion resistant
5 pin Tumbler precision cylinders
Square lock protection
Anti Spread Protection
Double Bolted Protection
Externally Sawing Resistant
Freeze Spray Resistant
Drill Protection
Cylinder Protection