A seven-piece set of metric hex bit sockets with a 3/8" square drive. A hex bit socket is an Allen bit carried in a socket body, so an internal-hex fastener can be driven with a ratchet or a torque wrench instead of an L-key; that buys reach into a recess an L-key cannot swing in, and leverage an L-key cannot give.

• 7-piece set
• Drive size: 3/8" square
• Metric sizes
• Drives internal-hex (Allen) fasteners with a ratchet
• Sold as a complete set