8" Bionic Grip Wrench, Grip Pipe & Fasteners, Auto Interlock, Open Ended Wrench With Auto Interlock, Will Grip Pipes From 1/2" - 3/4" Outer Diameter As Well As 5 Sae Size Bolts 1/2" - 3/4" & 8 Metric Sizes 13mm - 20mm, Open Ended Wrench Will Snuggly Grip A Pipe As Well As Grip A Bolt On 4 Sides, The Corners Allowing Amazing Torque With Minimal Effort, Works On Previously Stripped Bolts, Great Gift Item For Heavy D.I.Y. & First Time Tool Buyers, Lifetime Guarantee.