Socket adapter Unior 3/8" to 1" 12-point model 616935

The Unior socket adapter 3/8" to 1" 12-point model 616935 is a compact adapter that allows use of 1" sockets with 3/8" square-drive tools. Constructed to provide a secure 12-point engagement, the adapter converts between two common drive sizes so that existing 3/8" ratchets, torque wrenches or extensions can be used with larger sockets when required. The design focuses on a tight fit and reliable torque transfer while keeping overall dimensions small for access in confined spaces.

Advantages

This Unior adapter delivers precise fit between a 3/8" drive and 1" sockets with a 12-point interface that reduces risk of rounding the socket and fastener. Its solid construction ensures consistent torque transmission and long service life under normal mechanical and automotive workflows. The compact profile improves accessibility to recessed or tight fasteners, and the adapter is compatible with commonly used hand tools that accept a 3/8" square drive.

Suitable for

• Automotive maintenance and repair when larger sockets are required but only 3/8" drive tools are available
• Mechanical assembly and disassembly of machinery with large nuts and bolts
• Field service and maintenance where toolkits are limited and adapters expand versatility

Key specifications

• Drive input: 3/8" square
• Drive output: 1" square socket interface
• Engagement type: 12-point
• Construction: metal alloy designed for hand-tool use
• Form factor: compact adapter for access in confined spaces

How to use

Fit the adapter onto the 3/8" square drive of the ratchet, breaker bar or extension until it seats securely. Attach the 1" socket to the adapter’s output square and confirm the 12-point engagement is fully seated before applying torque. Use steady, controlled force appropriate to the socket and fastener; avoid impact or excessive torque beyond the tool and socket ratings. Remove the adapter by pulling it straight off the drive when work is complete.

Usage recommendations

Use the adapter only with hand tools rated for the intended torque and avoid using with high-torque impact tools unless explicitly specified by the tool manufacturer. Regularly inspect the adapter and mating socket for wear or deformation and replace if any signs of damage appear.