Restrictor Catches Features: Left and Right handed Variety of stud heights Constructed of stainless steel Specifications: Compliant with BS 6375 Part 2 Tested to a minimum order 100,000 cycle operational lifespan Product Options 5701-220 MKII RESTRICTOR LEFT HAND 5701-221 MKII RESTRICTOR RIGHT HAND 5704-269 MKII STUD PLATE 9.5mm 5704-271 MKII STUDPLATE 11.5mm 5704-274 MKII STUDPLATE 14.5mm Close Sash Blockers Locking and Non-locking Yale Excluder - Ancillary Security Device Shootbolts