PRACTICE WITH TRAINER “EYELASH EXTENSIONS” 3-5 h intensive training for handling mistakes in extensions under the supervision of a trainer. Coached practice format with intervention procedures so you don't waste time on what you already know. The training lasts 3-5 hours of intensive development and will give you the following skills: Correct hand placement and precision of movements Comfortable workplace organization Increasing the speed of procedures Correcting problems in your work Preparing for eyelash extension championships.