- Fits 5/16" to 3/8" (7.9 to 10 mm) Screen Frame
- Keeps Screen Frame Tight in Window Channel
CRL Flat Tension Springs
help hold screens tightly in the window channel. To install you can drill two 3/16" (4.8 mm) diameter holes 3-1/8" (79.4 mm) center-to-center. The CRL WST900 Notching Jig and Tool can be used to install the spring into the base of either 5/16" or 3/8" (7.9 or 10 mm) screen frame.
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