The Kirkpatrick 1550 Rim Knob Black Antique will fit all the rim locks that we sell. This rim knob is made from malleable wrought iron and has a black antique finish. It requires little to no maintenance and can best be kept clean using warm soapy water and a soft cloth. In the event of chipping occurring the affected area can be cleaned, wiped dry and filled in with black enamel paint. For use externally more care needs to be taken to maintain the knobs in pristine condition and a light coating of wax or wiping with an oiled cloth regularly will protect them.&nb...