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Solid bronze double cylinder deadlock with angle strike, dark bronze finish

Prime-Line

Prime-Line 688 Solid Bronze Double Cylinder Deadlock US10

SKU CH-SMFV-11QPW MPN 688

Solid bronze double-cylinder deadlock with jimmy-proof design, angle strike and SE1 keyway for commercial-grade security

  • Surface finishDark Bronze
  • Sold asEach
  • Product typeDeadlock Double Cylinder
  • Key featuresSegal
  • Commercial-grade locksmith quality for maximum security
  • Solid high-strength bronze alloy resists forced entry
  • Double cylinder with 5-pin SE1 keyway controls both sides
  • Angle strike and hardened drill-point screws reinforce the frame
  • Shutter guard blocks tampering if outer cylinder is compromised

Commercial-grade deadlock

The Prime-Line 688 is a solid bronze double-cylinder deadlock built to commercial-grade standards. Its hardened construction and shutter guard resist forced entry and cylinder tampering. The lock ships boxed with a solid bronze case bolt and angle strike for surface mounting.

Surface-mount retrofit projects

This deadlock suits doors that use a surface-mounted jimmy-proof design rather than a mortise cut-out. It is not intended for pre-bored cylindrical holes or mortise pockets. Builders needing a through-bolt tubular latch or a single-cylinder function should look elsewhere.

5-pin SE1 keyway

The double cylinder operates on a 5-pin SE1 keyway with a recessed collar. Both exterior and interior sides require a key for operation. Matching this keyway is essential for keyed-alike installations or master-key systems.

How it compares

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

Price $136.99
Pricier than about 74% of the 2,145 comparable items (median $55.99).

Specifications

Product
Model name688
Product typeDeadlock Double Cylinder
Size & build
Surface finishDark Bronze

Questions about this item

How can I verify the 688 deadlock is operating correctly after installation?

Insert the key into both cylinders and turn; the solid bronze case bolt should extend and retract smoothly into the angle strike without binding, and the shutter guard must block access to the inner mechanism when the outer cylinder is turned.

What components are included with the 688 lock set and what must be purchased separately?

The box contains the solid bronze case, angle strike, solid brass double cylinder with 5 pin SE1 keyway, recessed cylinder collar and hardened drill point screws; no additional parts are required for standard installation.

Which finish and cylinder configuration should I select for a commercial grade bronze deadlock?

Choose the US10 dark bronze finish with the double cylinder SE1 keyway, as this is the only version listed for the 688 model and matches the commercial grade specification.

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