(Purchased with my own money) Fillimilli Dual Eyelash Brush 591

I’d like to introduce the FilliMilli Dual Eyelash Brush 591, a beauty tool purchase I recently failed to make. I bought it thinking it would be convenient since it’s a dual-purpose product. It’s great for grooming eyebrows because it allows for more precise and easier use compared to a regular screw brush. However, when combing eyelashes, the bristles are sharper than those of a screw brush, so it hurts if you accidentally get pricked. Also, since my eyelashes are short and sparse, it doesn't have much effect. I wish the bristles were a bit narrower. I think it would be effective for people with long, full eyelashes. I’m not sure if it’s a necessary tool for me, and since it isn't, I consider it a failed purchase.