Easily instals to any bird cage in seconds with one wing nut (included) Calcium Perch from Bird Life by Penn-Plax provides birds with a non-skid textured perch that also trims their nails and beak naturally. This calcium perch attaches to virtually any model of bird cage in a matter of seconds with its standard washer and wingnut. The brightly coloured calcium perch is textured to provide a non-skid surface and is colour safe as well. This perch is fortified with added calcium which promotes bird health while its rough textured surface naturally trims beak and nails. The variable diameter perch reduces foot stress and fatigue and provides your bird with an extremely comfortable perch This 10 Calcium Perch from Bird Life by Penn-Plax is an ideal perch for large birds and small parrots.Each perch is brightly coloured and attaches to your birds habitat with the included wingnut and washer. The perch is fortified with calcium and features a heavily textured non-slip surface to keep your bird safe and on sure footing while also providing them with the surface they need to naturally trim their beak and claws. The variable diameter of the perch ensures that your bird will be able to stand comfortably without putting too much stress on the foot muscles. Simply attach the perch to your cage using the attached washer and wingnut.