UPVC Door Handle Spring Cassettes
![3 types of spring cassette for UPVC door handles](http://cdn.shopify.com/s/files/1/1177/2530/files/UPVC_Handle_Spring.jpg?13489177709479653243)
If the handle of your UPVC door is sagging the most common cause is a broken spring cassette in the door lever. Replacement is very easy, just unscrew the handle, lift off the broken cassette from the square spindle and replace it with a new one. Please measure your existing cassette carefully before ordering.