Proto Single 1/2" Drive 21mm Metric 12-Point Socket, Chrome Finish, Solid Toolbox Upgrade, Made for Daily Shop Work, Go-To Socket for Engine Work, Home Garages, and Job Sites

Proto Single 1/2" Drive 21mm Metric 12-Point Socket
✔️ 1 socket, 1/2" (12.7 mm) drive, 21 mm (0.83") size, 12-point, steel

This Proto single socket grips nuts and bolts tight so you can turn them with a ratchet, breaker bar, or wrench. It's a handy pick for auto repair, small engine work, and home garages.

✅ Pack size: 1 socket
✅ Brand: Proto
✅ Drive size: 1/2" (12.7 mm)
✅ Size: 21 mm (0.83")
✅ Measurement system: metric
✅ Points: 12-point
✅ Finish: chrome
✅ Material: steel
✅ Mfr part number: J5421M

💡 When should you use a deep socket instead of a standard socket?
Go deep any time the bolt sticks out past the nut.

• Deep sockets reach nuts on long studs, U-bolts, and threaded rod
• Standard depth sockets fit better where space is tight
• Having both depths on hand saves time on most repair jobs