Window Open Control Devices (WOCD's)
Jamma Lamma
Jamma Lamma Balance Pocket Insert – ½” and ¾” | Sash Window Spring Support & WOCD Holder
The Jamma Lamma is a precision-fit insert designed for ½” and ¾” balance pockets, compatible exclusively with constant force spring systems. It functions as a WOCD (Window Opening Control Device) holder and supports standard sash tilting for easy window operation. Featuring a secure tension bow that holds the unit in place until final adjustment, the Jamma Lamma includes a self-leveling insert for hassle-free sash alignment. Simply raise or lower the sash to level both sides before securing with screws.
Product Highlights
- Installs easily on single hung windows for improved ventilation and safety,
- Add multiple vent stops for increased window security, Ideal for use when internal rebar prevents standard vent stop insertion,
- Contoured design matches balance covers for a clean, seamless look
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