For Hinged Rebated or Over lapping Doors 27mm-162mm to be specified (strike not included) https://youtu.be/3d24dWSEnzA H ANDSF FREE FASTENERFor hinged rebated or overlapping doors from 27 to 162 mm offset, to be specified.2 MODELS AND 2 VERSIONS:527: standard version527HP: 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 series.Adjustable strike on 3 dimensions, similar for 520 fasteners series.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. Ref. 527 and 527HP 528 and 528HP Weight 1052 g 1169 g Number of screws 9 9 Dim. of screws 6 mm 6 mm