QIPAKLT 21-Piece Thick Door Lock Extension Kit – Adjustable Deadbolt Tailpiece Set for 1–4 Inch Doors | SC1 SC4 KW1 Compatibility

Overview

The QIPAKLT 21-Piece Thick Door Lock Extension Kit is a practical retrofit option designed for deeper, oversized doors. Instead of replacing an entire lockset, this kit adds extendable tailpieces and compatible components to existing hardware, helping you restore smooth operation and proper alignment on challenging door assemblies.

With a focus on versatility and ease, the kit supports common residential configurations while enabling a straightforward upgrade path for doors that sit beyond standard depths. The result is a more confident latch and a quieter, more reliable door experience without the disruption of a full lock replacement.

Key advantages

• Extends deadbolt tailpieces for doors from 1 to 4 inches thick, addressing misalignment and binding concerns.
• Compatible with SC1, SC4, and KW1 keyways, broadening options for existing homeowner hardware.
• Includes tailpiece extensions, tailpiece replacements, and extended screws to complete a retrofit without swapping the entire lockset.
• Functions as a thick door conversion kit for deadbolts, knobs, and handles on deep doors, offering installation flexibility.

What’s included and how it helps

• The 21-piece set provides a range of tailpiece options and hardware to tailor fit for varying door thicknesses.
• Long screws and modular components improve alignment with the strike plate, supporting smoother engagement and operation.
• Designed for thick doors, patio doors, and entry doors that require enhanced compatibility without a full hardware replacement.

Who might benefit

Ideal for homeowners, property managers, and renovation enthusiasts upgrading older doors or installing new entrances with deeper frames. It’s especially useful when existing hardware feels loose, stiff, or misaligned but you want to preserve your current lockset.

Usage notes and best practices

This extension kit is meant to complement your current hardware. Verify your door thickness and keyway compatibility before installation. The kit provides adjustable tailpieces and screws to support a reliable retrofit without guarantees of specific results.

How to assess fit (quick guide)

• Measure door thickness to confirm a 1–4 inch range.
• Check the current keyway (SC1, SC4, KW1) and ensure compatibility with the extensions.
• Test the alignment between deadbolt, strike plate, and latch after installation to ensure smooth operation.