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Apex EX-370-4 power drive adapter, transparent finish, 1/4 inch hex to 3/8 inch square drive

Apex

Apex EX-370-4 Power Drive Adapter

SKU CH-491Z-SQB9D

Converts a 1/4-inch hex power drive to a 3/8-inch square drive for powered fastening

  • Product colorTransparent
  • Connects 1/4" hex power tools to 3/8" square sockets
  • Four-inch length keeps sockets close to the work
  • Male-to-male drive ends lock securely together
  • Non-sparking and non-insulated for standard shop use
  • Apex Tool Group brand built for professional durability

Drive adapter for 1/4 in hex to 3/8 in square

This Apex EX-370-4 power drive adapter converts a 1/4 inch hex male input to a 3/8 inch square male output. It suits technicians who need to drive square-drive sockets with a hex-shank power tool. The 4 inch overall length provides reach in confined spaces. The tool is new and non-sparking is not rated.

Installation and common issues

Insert the hex shank into a compatible power tool chuck until it seats firmly, then attach the required 3/8 inch square-drive socket. The adapter transmits torque directly, so ensure the tool’s clutch or torque limiter is set correctly to avoid over-tightening. A worn or rounded hex shank can slip under load, damaging the chuck or fastener. Always verify the socket is fully engaged before applying power.

1/4 in hex to 3/8 in square conversion

The defining specification is the drive conversion: a 1/4 inch hex male input to a 3/8 inch square male output. This determines whether the adapter fits your power tool and accepts your sockets. No other size or drive combination is supported by this part.

How it compares

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

Price $11.99
Cheaper than about 70% of the 418 comparable items (median $20.99).

Specifications

Product
Brand nameAPEX TOOL GROUP
Product colorTransparent

Questions about this item

How can I confirm the 1/4-inch hex input drive engages securely with my power tool?

Insert the hex shank fully into the chuck or bit holder until it seats; the 4-inch overall length lets you feel positive engagement before applying torque.

What comes in the package and do I need a separate 3/8-inch square-drive socket?

The box contains one power drive adapter with a 1/4-inch hex male input and a 3/8-inch square male output; any 3/8-inch drive sockets required for the job must be purchased separately.

Which version should I choose if I need a 1/4-inch hex to 3/8-inch square power adapter?

The EX-370-4 is the single model offered with that exact drive conversion and a 4-inch overall length, so select it when those specifications match your application.

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