Before you pick a needle, keep in mind the result that your client is looking for, the area of the procedure, the type of the procedure, the client’s skin type, and the pigment that you are using. Be sure to: Match the diameter of the needle to the client’s skin type. Choose the number and shape of needles based on the outcome that your client is looking for. A larger quantity of needles will quickly create a more saturated look, which may or may not be desirable. For example, choose a single needle for hair strokes, shading during layering, building gradient, transparent lip color and other transparent techniques, and highly detailed work. If you need a saturated and defined line, such as for eyeliner, then use Round Liners. A liner is also good for shading thick, oily skin at low speeds for a textured and shaded look. Use Round Shaders or Magnums for shading over large areas quickly, choosing your configuration based on the size and shape of the area. Ultimately, the goal is to create quality work with the least amount of trauma so that as much pigment as possible remains after your work heals.