Whitco Winder Lockable Chain - 5 Disc

The Whitco 5 Disc Lockable Chain Winder is the go-to solution for awning and casement windows — the kind that crank open rather than slide. It replaces your existing winder while adding a proper key lock, giving you both smooth operation and genuine security in one unit.

It's a particularly common upgrade in homes where the existing winders have aged, corroded or no longer lock properly. It also directly retrofits over older MK7 and MK8 Whitco chain winder models, meaning installation in most cases is straightforward.

Child safety compliance The chain winder includes a restrictor clip that limits opening to either 100mm or 150mm — assisting compliance with Building Code of Australia requirements (D2.24) for operable windows in children's bedrooms and upper storey applications. This is an important consideration for new builds, renovations and rental properties in Victoria.

Key features:

• Push button to lock, key to unlock
• All winders are supplied keyed alike to each other — 2 keys per winder
• Through-flyscreen operation — no need to remove the flyscreen to operate
• Maximum opening 300mm (19 handle turns to fully open)
• Can be wound closed even when locked
• Foldable knob reduces width — won't catch blinds or curtains
• Zinc diecast body and mechanism
• Passivated zinc steel base plate and chain
• Exceeds Australian Standard AS4145.3-2001 (level DW2SW2K1)
• Restrictor clip included for BCA D2.24 child safety compliance
• Retrofits existing MK7 and MK8 Whitco chainwinder models

Suits: Aluminium or timber awning windows with butt or hook hinges, or non-friction stays

Finishes available: White · Black · Silver · Brown · Primrose

Need a corrosion-resistant version? A stainless steel chain and base plate option is available for coastal or high-exposure environments — contact us for pricing and availability.