Read the Patio Bolt & Mini Push-Bolt Buying Guide — second-point security on every sliding patio door for under $30 per bolt. 304 marine-grade stainless steel construction. Drops a steel pin into the track to stop the door being lifted off. Single, twin and triple packs all keyed alike to one master key. Compatible with Whitco®, Lockwood®, Stegbar®, A&L®, Bradnam®, Wideline® and Dowell® sliding patio doors. Tiered pricing.