ETOOK ET500 U-Lock is great for frame mount on most bikes. FEATURES & SPECS Get super protection with our ETOOK ET500 U-lock! Model: ET500Weight:S:1060g L:1240gSize:S:108*160 L:108*235Thickness:13mmSecurity level: 5Color: Black w/Grey Traction resistance Alloyed hardened special steel Square Lock protection Anti Spread Protection Double bolted locking Drill protection 13mm Shackle 5 pin tumbler precision cylinders corrosion resistant Externally sawing resistant Freeze spray resistant Cylinder protection Swiss Technology OTHER FEATURES SPECIAL STEEL:With thickness of 13mm, the lock is anti-shear 20T hydraulic shear, anti-bump, high-TT security. ANTI-DRILL PLATE: If the theft try to drill the lock cylinder,the anti-drill plate will rotate together with the drill,so it won't get damaged. AUTOMATIC HOMING FUNCTION: The lock will automatically lock if you put the lock body inside the lock head so you don't need a key to lock it. ANTI-SCRATCH: The silica gel is attached to the steel with good texture,which can protect your bike from scratching while using it. MULTI-FUNCTION:You can use this lock to lock your bike, ebike, motorcycle, etc. WHAT'S INCLUDED? Folding lock x 1 Lock holder x 1 Keys x 2 VIDEO