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
Gray Tools 3/8" drive insulated extension, 6 inches, orange and yellow layers, transparent finish

Gray Tools

Gray Tools T4-I 3/8" Drive Insulated Extension 6" 1000V

SKU CH-TK1F-FZ4NN

A 3/8" drive insulated extension providing 1000 V protection with dual-colour safety layers and ASTM F1505 testing

  • Product colorTransparent
  • 1000 V user protection from individually tested insulation
  • ASTM F1505 compliance confirms electrical safety rating
  • Dual orange and yellow layers give visual wear indication
  • Spring-loaded ball secures socket during live work
  • 6-inch reach keeps hands clear of energised parts

3/8" Drive 1000V Insulated Extension

This 6-inch insulated extension fits 3/8-inch drive sockets and is rated for work up to 1000 volts. It is built for electricians and technicians who need verified protection on live or potentially live circuits. The tool meets ASTM F1505 test requirements and carries the required California Proposition 65 notices.

Replaces uninsulated extensions on voltage-rated

Standard chrome extensions must be swapped out whenever the task demands 1000 V protection. The dual-layer insulation — orange over yellow — adds a visible safety indicator; if the yellow layer shows, the extension should be removed from service. The upgrade is worth it whenever insulated hand tools are specified by procedure or regulation.

Dual-layer insulation under sustained electrical

The orange outer layer and yellow inner layer are individually tested to ASTM F1505, so the dielectric barrier remains effective during prolonged contact with rated voltage. A spring-loaded ball retains the socket securely while the insulation system maintains its protective thickness. The visual indicator layer lets the user confirm integrity before each use without relying on a short-duration test alone.

How it compares

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

Price $24.99
Pricier than about 55% of the 418 comparable items (median $20.99).

Specifications

Product
Brand nameGRAY TOOLS
Product colorTransparent

Questions about this item

What drive size and length does this extension require to fit my 3/8" ratchet?

It has a 3/8" drive size and is 6" long, matching standard 3/8" sockets and ratchets.

How do I install it so the spring-loaded ball locks positively onto the socket?

Push the extension onto the ratchet anvil until the ball seats in the groove, then press the socket onto the extension until the ball clicks into the socket recess.

When should I replace the extension based on the dual-layer insulation?

Replace it if the orange outer layer is damaged enough to show the yellow inner layer, as the yellow layer is the visual safety indicator.

More in Ratchets, Sockets & Drive Tools

Similar items