This useful little item will help you apply skin bleaching cream/serum directly to small finite areas. Areas like your knuckles, toes, dark marks, elbows, nipples/areola and anywhere you need to apply skin bleach while avoiding surrounding areas. This pen brush is a durable air-tight refillable tube with a click-n-twist plunger, and leak-proof top. NOTE: You’ll need a pointed syringe to fill your pen brush with fluid. You can purchase some pointed syringes here