Seatylock Mason U-Lock - Black

It is the highest security rating given by Sold Secure, indicating the lock withstood a rigorous, sustained attack by professional testers using high-end power tools.

Yes, the Mason 140 is constructed with rust-resistant, UV-protected materials and an auto-shutter to keep the internals dry and debris-free.

Ensure you record the key code provided on the tag when you purchase the lock so you can order replacements if necessary.

Absolutely, its high security rating makes it an excellent choice for the higher theft risk associated with e-bikes.

Yes, it typically includes a specialized frame-mount bracket designed to secure the lock to the bike frame while riding.

Clear the keyway of any debris. If the issue persists, apply a tiny amount of dry lubricant and cycle the key several times.

Clean the shackle ends with a cloth and verify that no sand or metal shavings are inside the crossbar holes.

Gently check the shutter spring for debris or obstructions. If it remains stuck, clean it with compressed air.