Hello Customer, This is a simple multi-purpose 4 claw tool that can be used for variety of applications. As is true for most tools, they work best in applications that fit their design and operating range. A dryer vent is more than 4 inches in diameter and this tool is only about 0.25 inch in diameter (0.5 inch at the tip) so depending upon where the lint is deposited inside the vent and the location of the tool, it may not be touching the lint area. Please contact us at sales@pfwaterworks.com and we can offer alternative solutions for dryer vent cleaning (usually a large 3-4 inch brush). Thanks.,