Kryptonite Evolution 790 Folding lock uses 5.4mm hardened steel links for high security- rated high enough for valuable ebikes. The links are rubber-coated to protect the bike's finish. Fold the lock up to a compact size and mount it in the included bracket for easy transport to where it is needed.5.4mm hardened steel links for high security lock upsFeatures a 360 degree roating lock headDurable rubber coating on steel links protects the bike frameIncludes new click tight bracket for effortless quiet and reliable transportIncludes 2 keysEbike approvedEligible for the anti-theft protection offer