Which tool is adjustable to different jaw sizes for gripping various workpieces?

• A. Channel lock pliers
• B. Scriber
• C. Disk grinder
• D. Marking gauge

Answer: (A)

The idea here is a tool with adjustable jaw width to grip workpieces of different sizes. Channel lock pliers are built with a sliding linkage that lets you open or close the jaws to fit various shapes and widths, then lock them in place for a secure grip. This versatility makes them suitable for gripping small hardware, pipes, or irregularly shaped parts without needing separate tools. The other tools serve marking or grinding functions and don’t offer adjustable gripping jaws.