Kryptonite Keeper 510 Folding Lock: Black 100cm 3mm3mm hardened steel links for moderate security lock ups Compact and easy to transfport with included bracket 2 keys included, with Key Safe Program Security Rating 5 10 Available Anti Theft Protection $500 TECH SPECS Primary Color Black Thickness In mm 3mm Bracket Frame mount bracket (included) Lock Type Key Internal Lock Size Imperial 3. 3 Internal Lock Size Metric 100cm