This expanded Drill Expert Smart Kit is perfect for those who want the whole package for fast and precise removal, prep and filing. The kit contains:• Drill Expert™ SMART Electric Nail File• Mandrel Bit• Sanding Bands #100, 180, 320 (45 pcs)• Micro Mandrel Bit• Micro Sanding Bands #120, 150, 180, 240 (60 pcs)• Sanding Disc Mandrel Bit• Premium Sanding Discs • Grit 180 (20 pcs)• Premium Sanding Discs • Grit 240 (20 pcs) Drill Expert™ SMART Electric Nail File is a cordless electric nail file of the highest quality. It offers stepless adjustable speed up to 14,000 revolutions per minute, two rotation directions, a virtually silent motor and no vibrations in the handpiece. It is the perfect electric nail file for home use. The mandrel bit is made of the highest quality and designed to effectively hold a sanding band. The mandrel bit is an essential addition to our Drill Expert Electric Nail File. Its small notches at the bottom of the head grip the sanding band and ensure an easy filing process, where the sanding band is secured and held in place throughout the process. Sanding bands, also known as sanding rolls, are small cylindrical sandpaper rolls that are mounted on a mandrel bit in your electric nail file. They are indispensable when doing your own nails at home and are primarily used for filing, shaping or removing gel products. Sanding rolls come in different grits, which indicate how fine or coarse the filing will be. Thanks to the ultra-high grain quality of these sanding bands, they can be reused several times. They are also easy and quick to change. The Sanding Disc for Mandrel Bit is specially designed to hold your discs securely in place so you can shorten and shape your nails easily and precisely – every time. The flat head and strong grip ensure maximum stability and smooth filing without shaking. An indispensable tool when you want to make your nail routine faster and more efficient. The Micro Mandrel Bit from The Gel Collection is a bit designed exclusively for Micro Sanding Bands. It is made of the highest quality and developed to effectively hold a micro sanding band. The Micro Mandrel Bit is an essential addition to our Drill Expert Electric Nail File when you want to use Micro Sanding Bands to file your gel product. Micro sanding bands are extra thin cylindrical sandpaper rolls that are mounted on a Micro mandrel bit in your electric nail file. These thin sandpaper rolls are essential for filing gel products, as their thin shape allows you to get very close to the cuticle and work on the smallest details when filing. Micro sanding bands come in different grits, which indicate how coarse or fine the filing will be. Thanks to the ultra-high grain quality of these sanding bands, they can be reused several times. They are also easy and quick to change. Sanding Disc Mandrel Bit is specially designed to hold your discs securely in place so you can shorten and shape nails easily and precisely – every time. The flat head and strong grip ensure maximum stability and smooth filing without vibrations. An indispensable tool when you want to make your nail routine faster and more efficient. Premium Sanding Discs make it easy to shorten your gel nails easily and precisely – every time. The flat surface provides smooth filing, giving you consistent results with minimal effort. The discs are easily attached to our Sanding Disc Mandrel Bit and can be replaced in seconds – so you always work with fresh, sharp discs. Grit 180 is ideal for shortening nails – especially with Liquid Builder Gel, Builder Gel and Polygel. Grit 240 provides finer and more controlled filing – perfect for Rubber Base or Geltips.