This 21 mm socket with a 3/8 in drive is designed for tightening and loosening compatible nuts and bolts with a ratchet, extension bar or other 3/8 in square-drive tools. It is intended for workshop and mechanical fastening tasks where secure fitment, reliable tool retention and controlled torque application are required.

Features

• Chamfered ends help guide the socket onto the fastener for secure location
• Special radius design supports effective torque transfer during use
• Knurled band improves hand grip when fitting or removing the socket
• Retention hole allows positive ball locking on compatible drive tools

Specifications

• Socket size: 21 mm
• Drive size: 3/8 in
• Material: chrome vanadium steel
• Heat treatment: hardened and tempered
• Finish: chrome plated with satin finish