Lowest according to camelcamelcamel.
The WORX WX668 Sonicrafter multi tool is a ultra-versatile tool for cutting, sawing, scraping, sanding and more. It features variable speed control and multi-angle adjustment adapts to different applications. Its slim body design ensures a secure grip at all times. The multi-tool will work on wood, metal, plastic, ceramic, drywall and more.
Variable speed up to 21000rpm.
Soft grip handle