Proto Single 5/16" x 3/8" SAE Open End Wrench, Black Oxide Finish, Great Pick for Pros and DIYers, Solid Toolbox Upgrade, Pro Mechanic Wrench for Auto Repair and Shop Work

Proto Single 5/16" x 3/8" SAE Open End Wrench
✔️ 1 open end wrench, 5/16" x 3/8" size, black oxide finish

Need a solid open end wrench? This Proto single open end wrench slides onto nuts from the side, which is handy on fittings and spots with little room, and it fits right in with auto shops, hydraulic work, and home garages.

✅ Pack size: 1 open end wrench
✅ Brand: Proto
✅ Size: 5/16" x 3/8"
✅ Measurement system: SAE
✅ Finish: black oxide
✅ Mfr part number: J3020B

💡 When should you use an open end wrench?
Open end wrenches are best when you can't get around the nut.

• They slide onto nuts from the side, great for lines and fittings
• Double open ends give you two sizes in one tool
• For tight bolts, a box end or flare nut wrench grips better