A cutoff tool and a grinder may look similar, but they serve different purposes. Let's compare two models from DeWalt: the DCS438B Cutoff Tool and the DCG405B Angle Grinder.

The DeWalt DCS438B is a compact cutoff tool designed for precise, straight cuts. It's typically used for cutting through materials like metal, plastic, and tile. This tool has a smaller blade, usually around 3 to 4 inches, which makes it perfect for fine, controlled cuts. The lightweight design and small size make it easy to handle in tight spaces. It’s a great tool for tasks that require accuracy rather than brute force.

On the other hand, the DeWalt DCG405B is an angle grinder. Grinders are versatile tools that can cut, grind, polish, and sand various materials. The DCG405B is more powerful and uses a larger disc, typically 4.5 to 5 inches, allowing it to tackle heavier jobs. It's perfect for smoothing out rough surfaces, removing rust, or even sharpening tools. While you can use it for cutting, grinders are bulkier and may not offer the same precision as a cutoff tool.

In summary, if you need clean, precise cuts, go with the DCS438B cutoff tool. If you’re looking for a powerful, all-around tool that can handle a variety of tasks, the DCG405B angle grinder is the better choice. Both tools are excellent, but each shines in different situations.