The IDEAL Electrical 35-450 RoboGrip Self-Adjusting Pliers features a self-adjusting, spring-loaded mechanism that makes gripping onto any material quick and secure. The tooth cam mechanism locks the grip and a laminated steel construction offers additional strength. For superior comfort, the handles are ergonomically designed to prevent user fatigue. The curved jaw design allows the user to grip objects up to 1-1/8 inches in size.