【Portable and Easy to Use】: The size of the practice finger is 10cm 8cm 6cm weight: 100g(approx). Hassle free installation and very easy to use. 【T-Slot Anti-Slip Safety Design】: The newly upgraded “T”-slot design will not fall off even if you use a high-speed electric nail drill to grind the nail tip, which solves the problem of repeated falling off of the nail tip during practice, helping you to complete the nail design easily and smoothly.