All CX5 cylinders are produced from high quality solid brass extruded rod material and are available in most popular architectural finishes. By default, cylinders are shipped without keys and no security groove sidebar pins. The pin tumbler chambers are “zero-bitted” with brass bottom pins, driver pins and stainless steel springs. Cylinders are available with the optional enhanced UL 437 features for greater security using stainless steel components and added protective elements.