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The KWIKSET 663SQT-15.DS is a one-sided turn square deadbolt designed for residential door applications where keyed exterior entry is not required. This unit includes an RCAL latch, Dual RCS, and a 5303 Full Lip Strike, providing a complete hardware set for single-door installation. The deadbolt ships in a Satin Nickel finish and is sold as an individual unit. At 0.7 pounds, the assembly is compact and straightforward to fit into a standard door prep. Licensed locksmiths, carpenters, and general contractors are the typical installers for this type of hardware.
This deadbolt is suited for interior or single-access residential doors where one-sided turn operation is the required function — common in utility rooms, storage areas, or interior doors where a keyed cylinder on the exterior face is not needed. The included Full Lip Strike and RCAL latch streamline the installation by reducing the need for separately sourced hardware components. The Satin Nickel finish coordinates with a wide range of residential door hardware styles.
Designed as an OEM-style replacement or new-installation deadbolt for standard residential door preps requiring one-sided turn deadbolt function with a full lip strike configuration.
Installation should be performed by a licensed locksmith, finish carpenter, or qualified contractor familiar with residential door hardware. Power down any associated electronic access systems before servicing the door assembly. Verify door edge prep and backset dimensions match the latch and strike before final installation. Follow all applicable local building codes for residential door security hardware.
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