We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Yellow 1/2 inch drive torque limiting extension bar with powder coat finish

American Forge & Foundry, Inc.

American Forge & Foundry, Inc. 40065 1/2 in Drive Torque Limiting Extension Yellow

SKU CH-TXSM-Z57K9

A 1/2-inch drive torque-limiting extension that stops turning at a preset value to protect wheels, studs and brake rotors from over-tightening

  • Product colorTransparent
  • Prevents over-torqued lug nuts with torque-limiting design
  • Maintenance-free operation requires no recalibration ever
  • Chrome molybdenum steel construction resists wear under heavy use
  • Powder coat finish protects against chips and fading
  • Yellow colour coding enables quick size identification

1/2 in Drive Torque Limiting Extension

This 1/2 in drive torque limiting extension is designed for tire shops, automotive repair, and fleet maintenance. It stops turning once a specified torque is achieved, preventing damage to wheels, studs, and brake rotors from excessive force. The tool allows for accurate and specific torque application to wheel lug nuts. Its maintenance and recalibration-free design supports professional workflow efficiency.

Capacity and headroom

The extension handles the torque requirements of standard automotive wheel fastening tasks within its calibrated limit. It runs out when the applied force exceeds the preset torque value, at which point the mechanism disengages to prevent over-tightening. This capacity suits routine tire changes and scheduled fleet maintenance intervals. Users requiring adjustable or higher torque ranges will need a different tool configuration.

Build quality and daily use

Built with professional grade chrome molybdenum steel, the extension offers maximum durability and long life under heavy shop use. A powder coat finish prevents chipping, scratching, and fading, preserving the tool's appearance and corrosion resistance. Color coding and hard stamped size markings provide easy identification in a busy toolbox or on a mobile service cart. The 1/2 in drive fits standard impact sockets and ratchets used in automotive environments.

How it compares

Measured against everything we stock in Ratchets, Sockets & Drive Tools, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 58% of the 418 comparable items (median $20.99).

Specifications

Product
Brand nameAMERICAN FORGE & FOUNDRY
Product colorTransparent

Questions about this item

Will this 40065 extension work with my existing 1/2 in drive sockets and ratchet?

Yes, it has a 1/2 in drive on both ends so it fits standard 1/2 in sockets and ratchets you already own.

How can I confirm the 40065 is limiting torque correctly after I start using it?

The extension stops turning once its preset torque value is reached; you will feel a distinct release and the socket will no longer advance.

What comes with the 40065 and do I need to buy anything else to use it?

The box contains the torque limiting extension only; you supply the 1/2 in drive ratchet or breaker bar and the correct socket for the lug nuts.

More in Ratchets, Sockets & Drive Tools

Similar items