Proto Single 5/16" SAE Open End Wrench, Favorite of Pros and DIYers, Tough Build for Regular Use, Open End Tool for Nuts, Fittings, and Tight Spots

Proto Single 5/16" SAE Open End Wrench for Pro Shop Use
✔️ 1 open end wrench, 5/16" size, pro-grade build, made for daily use

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"
✅ Measurement system: SAE
✅ Mfr part number: J3126

💡 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