Hydrea London Extra Tough Nail Brush with Cactus Bristle, Hard Strength The extra firm cactus bristle is excellent for really removing stubborn dirt under the nails and on the hands. The bristles remain stiff even in water and improve with age. The short stiff bristles on one side clean under nails effectively while the longer bristles on the other soften cuticles and stimulate the nail bed for healthy nail growth while exfoliating the skin and boosting blood flow for smoother younger looking hands. Perfect for gardeners and the hands on. FSC Certified Beechwood