A precision hex key designed specifically for adjusting Fab & Fix roller sash window hardware. The 4mm hex key allows accurate, tool-assisted adjustment of roller sash fittings post-installation, ensuring smooth operation and correct alignment.

Key Features

• 4mm hex key for roller sash window hardware adjustment
• Designed for use with roller sash stops and fittings
• Enables precise post-installation adjustment
• Compact and easy to use on site
• Suitable for timber and uPVC roller sash windows