Who doesn't want to improve their skills and creativity? Keep the YN Nail Trainer Refill Set at the ready in your nail art arsenal and sky's the limit. Practice and obsess, then go on and practice some more because every single one of the these plastic flesh-toned trainer tips are like a secret weapon for a killer set of nails. Each tip snaps into place easily and attaches to the YN Nail Trainer with an option of loose or tight fit. Oh, snap!