It can effectively block the splash of debris such as dust/mud/sawdust during operation. Rotary tool guard quickly adjusts into place for easy access to accessories without disturbing the workpiece Quick and easy installation, simply install the protective cap directly into the power tool and tighten Fragments and sparks can be diverted away from the user without interfering with the task at hand. Easy to use, redirect sparks or deflect debris in a variety of applications including cutting, sanding, lapping and polishing. The guard quickly adjusts into place for easy access to accessories without disturbing the workpiece. Transparent design, while improving the safety of project work, it will not affect your work and improve work efficiency. Compatible with Dremel tool models: 100, 200, 275, 285, 300, 395, 398, 400, 770, 800, 3000, 4000, 8100, 8200, 8220, 4200.