The Roto Flex from Milescraft is a flex shaft that allows you to get your rotary tool out of the work area while allowing you to use the comfortable grip of the stylus. This product works with any rotary tool and is the most flexible flex shaft on the market with a new 5 inch bend radius allows you to get around corners and into tight spaces you couldn't reach before. With an integrated shaft lock， you can easily exchange accessories and bits in the stylus. Great fingertip control for intricate design work.