Laser-etched SAE and mm jaw scale for easy size adjustment, Built-in tension spring stabilizes movable jaw., Forged chrome vanadium steel is strong and durable. Meets ANSI specifications., Slip-resistant bi-material handle for a comfortable grip. Used for automotive maintenance and repair, plumbing and general assembly tasks. Limited Lifetime Warranty, Max Jaw Capacity: 13/14" / 26.3mm Head Width: 11/25" / 11.2mm