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Polished chrome jimmy-proof deadbolt with flat strike and thumb turn

Tuff Stuff

Tuff Stuff Jimmy Proof Deadbolt Single Cylinder Polished Chrome US26

SKU CH-ZN31-DH3WG

A surface-mounted deadbolt with a shutter guard that blocks lock manipulation when the cylinder is removed, fitting doors 1-3/8 to 2-1/4 inches thick and including two keys and mounting hardware

  • Lock keyingKeyed Different
  • Strike typeFlat
  • Main functionJimmy Proof - Single Cylinder
  • Surface finishPolished Chrome
  • Sold asBox
  • Product typeDeadbolts
  • Jimmy-proof design resists prying attacks with solid bronze construction
  • Single-cylinder operation uses key outside and thumb turn inside for convenience
  • Shutter guard activates if cylinder is removed to block screwdriver manipulation
  • Polished chrome US26 finish provides corrosion resistance and clean appearance
  • Includes two keys and mounting hardware for immediate installation

Single-Cylinder Jimmy-Proof Deadbolt

This polished-chrome deadbolt mounts on the door surface and uses a single cylinder operated by a key outside and a thumb-turn inside. It suits residential and light-commercial doors that need surface-mounted security without mortising the edge. The shutter guard blocks screwdriver manipulation if the cylinder is removed from the exterior. Supplied with two keys and all mounting hardware for a straightforward fit.

Capacity and Headroom

Fits doors from 1-3/8 in. to 2-1/4 in. thick with a fixed 2-3/8 in. backset and a flat strike. The brass body and solid rim cylinder handle daily locking cycles and resist prying at the latch point. It runs out when a mortise pocket is required, when a double-cylinder function is specified, or when a thicker door exceeds the stated range. Keyed-different cylinders prevent one key from opening multiple units.

Surface-Mount Interface Limits

The lock installs with exposed screws on the interior face, so the door must provide a flat mounting surface at least 4-1/2 in. wide by 2-15/16 in. tall. The flat strike requires a square-edged frame cutout; it will not align with radiused or T-strike prep. No electronic or smart-module integration is supported, and the cylinder cannot be re-keyed to an existing master system without a locksmith.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $72.99
Pricier than about 57% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameEm-D-Kay
Model namePremium Security Series
Product typeDeadbolts
Size & build
Surface finishPolished Chrome
Main materialBrass
More details
Lock keyingKeyed Different
Strike typeFlat
Main functionJimmy Proof - Single Cylinder

Questions about this item

Will the 2-3/8" backset on this Jimmy Proof deadbolt align with the existing bore holes in my older door?

The lock is built for a 2-3/8" backset and fits doors 1-3/8" to 2-1/4" thick. Measure your current backset and door thickness; if they match these figures the mounting holes will line up.

How can I confirm the shutter guard is active after I install the single-cylinder lock?

Remove the rim cylinder from the outside. The guard should block any screwdriver attempt to turn the bolt. Re-install the cylinder and test both the key and the interior thumb turn for smooth operation.

Does the box include the flat strike plate and the two keys shown in the specifications?

Yes. The package contains the Jimmy Proof deadbolt body, a flat strike plate, two keys keyed different, and all mounting hardware needed for installation.

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