Defender Security U 9850  Lock, 1 in., Zamac Cast Housing w/Aluminum Bolt, White, Twist-In Action Used on horizontal sliding windows and patio sliding door systems as a secondary security locking device 1/2 reach x 11/16 in. body height White painted finish Zamac cast housing with twist-in action aluminum bolt Used on horizontal sliding windows and patio sliding door systems as a secondary security locking device 1/2 reach x 11/16 in. body height White painted finish Zamac cast housing with twist-in action aluminum bolt