K-17 is a Security Guide & Bolt, which is made of steel with cadmium plated finish. The K-17 Security Guide & Bolt replaces the flimsy plastic guides and flush bolts provided by many manufacturers with quality steel. With a relatively simple installation, you eliminate the possibility of a burglar breaking in by merely snapping the plastic bolts. Use the short side to replace the BBW Guide. Use the long side to replace the Slide-Co & W&F GuidesReplaces plastic pin with steel bolt. Self-Tapping screws included.