The Whitco Lockable Window Winder in Primrose is a CYL4 chain type operator that opens and locks awning windows on aluminium or timber frames. Its CYL4 cylinder keys alike to your C4 door key, giving secure ventilation and one-key convenience across your doors and windows.

Features:
– Chain type operator that locks awning windows in the closed position.
– CYL4 cylinder can be keyed alike to all door locks using a 5-pin C4 profile key and to other CYL4 window locks.
– Foldable knob in the handle reduces width to prevent damage and interference with blinds.
– Zinc diecast body and mechanism with passivated zinc steel base plate and chain.
– Corrosion-resistant version available with a stainless steel chain and base plate.
– Retrofits existing Whitco MK7 and MK8 chainwinders; two Whitco keys included.

• Smooth operation
• Through flyscreen operation
• Maximum opening 300mm, 19 handle turns to fully open
• Foldable knob in handle reduces width preventing damage and interference with blinds
• Restricted opening versions available