The Skinmaster 10 digital machine is for permanent makeup and skin needling for trained professionals. The clear-view cartridges prevent needle sticks when the motor is not running PLUS prevent backflow into the German motor. Precision dial on handpiece lets you adjust needle depth to each .1 mm for perfect healed results on eyeliner, brows, lips, areola and scars and acne. Choose 1,3,5 round, 4, 6 flat and 12 point microneedle cartridges at reasonable prices. Special .25mm 12 point needle excellent for estheticians. Gamma Sterilized, single-use needle cartridges.