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Thimble Lock Lock in your safety.

A patent-pending clamp that fully encases the thimble during cable tensioning — keeping workers out of the line of fire and turning a two-person job into one.

Safer Faster Cost-Effective
Thimble Lock clamp

The Problem

Cable tensioning puts people in the line of fire

Struck-by and caught-in-between incidents are part of OSHA's “Fatal Four.” Today, a worker holds the thimble in place with a claw hammer while a coworker adds tension — standing directly in the danger zone.

10–12%

of OSHA's recordable incidents each year involve struck-by and caught-in-between hazards.

  • Takes two people to do safely
  • A claw hammer held in the danger zone
  • Constant line-of-fire exposure while tensioning

The Solution

The Thimble Lock encases the thimble completely

Two machined halves clamp around the thimble and shackle and gridlock all movement. No claw hammer. No second set of hands in the danger zone. One person, done in minutes.

Two machined halves
01 Two machined halves
Clamp around the thimble
02 Clamp around the thimble
Locked & ready to tension
03 Locked & ready to tension

Why Crews Choose It

Built to take a job off the danger list

Safer

Keeps everyone out of the line of fire and removes the claw hammer from the danger zone entirely.

Faster

Installs in about ten minutes and lets one person do what used to take two.

Cost-Effective

Fully reusable — transfer the same tool from cable to cable across matching thimble sizes.

Fits 3/8″–1″ cable Carbon steel, stainless & aluminum ~10-minute install Reusable & transferable Patent pending

Where It's Used

Built for the field

Anywhere guy-wires and cables get tensioned.

Cell & Radio Towers

Water Towers

Oil Rigs

Aerial Platforms

Bridge Platforms

Our Story

Born on a bridge

Founder Garrett Brooks spent his career tensioning cables — building suspended work platforms under bridges alongside his father, a 26-year industrial painter. Every cable meant holding a thimble in place by hand while someone else added tension.

“I wish someone would make something to hold the thimble in place.”

— the idea that became the Thimble Lock