Whitco Lockable Chainwinder MK8 - Black W380217 If you purchase more than 1 lock, all locks will be supplied keyed alike. ie. All locks work using the same key. Chain Winder designed to suit awning window systems. Chain Winder Function - provides locking for aluminium or timber awning windows. Features: Suits aluminium or timber awning windows with butt or hook hinges, or non friction stays Smooth operation Through flyscreen operation Push button to lock, key to unlock Less than 1 mm between locking points Maximum opening 300 mm, 19 handle turns to fully open (Window Restrictor Clip included) Can be wound closed when locked Hooded sash bracket prevents chain being dis-engaged from sash Zinc diecast Security Sash plate Standard and one way fixing screws supplied Retrofits existing MK7 and MK8 Whitco chain winder models Foldable knob in handle reduces width preventing damage and interference with blinds Restricted opening versions available. Zinc diecast body and mechanism, Passivated Zinc steel base plate and Passivated Zinc steel chain Corrosion resistant version available with Stainless Steel chain and Stainless Steel base plate Residential pack available with printed instructions on sealed poly bag Exceeds the requirements of Australian window lock standard AS4145.3 - 2001 level DW2SW2K1 Restricted opening version can satisfy pool regulation requirements Keying: 5 disc wafer cylinder - Can be Keyed Alike to other Whitco 5 disc products Two Whitco keys included Window Size Guidelines: Maximum weight of sash 15kg with 300mm opening Recommended maximum sash width of 900mm to ensure adequate weather sealing of the window system Corrosion: Minimal effect to full exposure to 96 hours Neutral Salt Spray mounted on powder coated Aluminium sill section