Description: Specially designed nail drill bit set for professional manicurists in nail salons or someone who love DIY nail art at home. Excellent heat dissipation, high wear resistance, easy to clean and disinfect, portable to use. Stungsten steel made, strong hardness, durable for long time use, providing you a better polishing performance. 2.35mm Handle diameter, suit for most polishing machines, 30 different kinds drill bits packaged in a storage box, which will meet your different needs. Used to remove excess glue and material from the underside of acrylic, gel nail. Specification: Material: Tungsten Steel Size: Approx. 4.2 cm/1.65 inch Package Includes: 30 Pieces/Set Nail Art Grinding Heads Note: 1.Color may vary slightly because of the difference of display screens. 2.Please allow 1-3mm errors due to manual measurement. 3.Thanks for your understanding and attention, wish you a pleasant shopping experience!