- UL/cUL listed for use on 3 hour fire doors
- Non-handed and easily field reversible
- Easy-to-use thumbturn or double cylinder function available
- 2-3/4″ backset
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Yale's 350 Series Mortise Deadlock is a heavy-duty mortise deadlock that provides the ultimate security. Available in a range of functions, you can expect the highest quality and dependable security from this product.