Mul-T-Lock HD1-26 Satin Chrome Hercular Single Cylinder Deadbolt with Thumb Turn 006 Keyway

High-Security Deadbolt for Residential

The Mul-T-Lock HD1-26 is a single-cylinder deadbolt with a satin chrome finish, designed for high-security residential and commercial entry points. It features a Hercular mechanism operated by a key on the exterior and a thumb turn on the interior. The lock carries ANSI Grade 1 certification and UL 437 listing for drill and pick resistance, meeting heavy-duty security requirements.

Adjustable Backset Fits Standard Door Preparations

The deadbolt includes an adjustable backset covering 2-3/8 to 2-3/4 inch recesses, allowing it to fit common door preparations without modification. It is constructed from solid brass and steel components and is UL listed for use on fire-rated doors. The package supplies two keys and a key ID card that supports the manufacturer’s patented key control system for restricted duplication.

Mechanical Operation Requires No Power or Wiring

As a purely mechanical lock, it draws no power and produces no electronic noise during operation. The bump-proof cylinder resists drilling, picking, wrenching, hammering, and prying attacks through physical hardening rather than active systems. Normal use consists of manual key rotation or thumb-turn actuation, with thermal performance irrelevant to its function.