Bolt locks securely into frame of patio door. Key operated with tamperproof screws. Can be locked partially open for safe ventilation. Resists prying or lifting door out of track in locked position. Convenient foot operation. Locks and unlocks with key. Painted aluminum finish. 15/16 In. W. x 2-5/16 In. H. x 1-1/8 In. D. Includes: 1 lock with 2 keys and installation screws.