The Kirkpatrick Star Spindle Knob Black Antique is the perfect solution for additional home security. This door bolt is made from malleable wrought iron. It has a black antique finish.  English Made Quality Products Kirkpatrick products have been produced in Walsall for over 150 years and being the market leader, they have over time been copied and imported by others. Very few of these copies are made from whiteheart malleable iron and consequently are unlikely to give the same service and lifespan expected of a quality product.