For hinged rebated or overlapping doors from 27 to 162 mm offset, to be specified.2 MODELS AND 2 VERSIONS:527: standard version Non Locking527HP: high performance528: standard locking version528HP: high performance, locking version, with stainless cylinderOption:Antimicrobial resistant lever: lever with treatment that limits the growth of harmful microorganisms* (please see documentation)This fastener is interchangeable with 520 fasteners serie.Adjustable strike on 3 dimensions, similar for 520 fasteners serie.FEATURES:Hands free solution, this fastener is openable with the elbow.Made of:compositeMechanism:standard version: zinc-passivated steelHP version: stainless steel- Invisible and tamperproof screws- Interchangeable for left or right hand doors- Soft and quiet operationOption: internal antipanic release 2114 HP*The use of antimicrobial resistant fasteners complements good practices and barriers to limit the spread of viruses and bacteria and cannot replace them.