Ergonomic Comfort Handle: Designed with an ergonomic grip and stable plastic construction, this diamond art tools ensure comfortable use during extended crafting sessions Perfect for Crafters: This diamond art accessories makes an ideal for painting enthusiasts, suitable for birthdays, holidays and creative workshops Scratch-Free Smooth Surface: The diamond art straightening tool glides effortlessly without damaging gems, creating bubble-free surfaces perfect for beginners and experienced crafters alike 3D-Printed Quality: Made from plastic using advanced 3D printing technology, this 5-inch roller maintains structural integrity through frequent use in DIY projects 10-Ridge Precision Design: This diamond art roller tool features 10 accurately spaced ridges that apply even pressure across your canvas, securely embedding diamonds into adhesive while minimizing gaps for professional results