Thanks to this product’s multiple accessories, you’ve got a lot of choices when it comes to bit heads. In a WEN 2305 vs Dremel 4000 battle, the 4000 wins because of its EZ change cap, but the 2305 is not a complete loser though. This product features a spindle lock. This allows it to change bit heads easily, though it still takes a bit of time. https://rotarytoolsguy.com/wen-2305-rotary-tool-kit-review/