Transform your window and door installations with these professional-grade knock-on white frame extenders – the ultimate solution for achieving perfectly level, secure, and long-lasting frames every time.

Say goodbye to frustrating gaps, unlevel installations, and time-consuming adjustments. These convenient 1m x 15mm knock-on extenders deliver precision spacing and support exactly where you need it, ensuring your frames sit perfectly flush and stable from day one.

Why do installers choose these frame extenders:

• Eliminates costly callbacks from poorly fitted frames
• Speeds up installation time with easy knock-on application
• Creates professional, gap-free finishes that impress clients
• Provides reliable load distribution to prevent sagging over time
• Clean white finish blends seamlessly with window frames
• Convenient 1meter length can be cut to any size needed

Whether you're fitting uPVC windows, doors, or other frames, these versatile packers give you the confidence of a professional finish on every job. The knock-on design makes installation quick and hassle-free, while the durable construction ensures lasting performance.

Sold by the metre, you'll have exactly what you need for multiple installations without waste. Invest in quality that protects your reputation and keeps customers satisfied for years to come.