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Security window locks

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Black Window Thumbscrew Lock - S4001
Made of heavy duty cast aluminum, the GDI Window Thumbscrew Lock securely locks your window in a closed or open ventilating position with the turn of a single thumbscrew. The black finish blends in with your window frames. The lock makes it easy to have both security and ventilation. Learn More

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$5.99
Zinc Twist-In Door Lock - S4002
Using a simple twist action, the GDI Twist-In Door Lock, securely locks a sliding patio door in a closed or ventilating position with a 1/2 inch (12.7 mm) aluminum bolt. When the bolt is thrown, it prevents the door from sliding or being lifted off of its track. It has a zinc plated aluminum cast housing. Learn More

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$8.99
Black Twist-In Door Lock - S4003
Using a simple twist action, the GDI Twist-In Door Lock, securely locks a sliding patio door in a closed or ventilating position with a 1/2 inch (12.7 millimeter) aluminum bolt. When the bolt is thrown, it prevents the door from sliding or being lifted off of its track. Learn More

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$8.99
Black Tamperproof Window Lock - S4033
Made of heavy duty cast aluminum, the GDI Tamperproof Window Lock securely locks your window in a closed or ventilating position. Utilizing a hex security screw and wrench, the lock is unable to be accidentally opened by children. The lock is easy to install. Simply place it in the window rail and attach. The black finish matches your window frame. The hex wrench has a large key ring for hanging safely away from the window. Learn More

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$7.99
Aluminum Finish 2-3/4" Nite-Lock Pin - S4066
The GDI Sliding Door Nite-Lock Pin has a plated, case hardened, steel pin which has a "detent ball" on the end to help hold the pin into place. It securely locks the window or patio door in a closed or ventilating position and prevents sliding or lifting. When unlocked, the pin stores in its holder. Learn More

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$5.99
1-5/16" Sliding Window and Door "Nite-Lock" Pin with Ball Stop - S4067
The GDI Sliding Door Nit-Lock Pin has a plated, case hardened, steel pin which has a "detent ball" on the end to help hold the pin in place. It securely locks the window or patio door in a closed or ventilating position and prevents sliding or lifting. When unlocked, the pin stores in its holder. Learn More

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$5.99
White Twist-In Door Lock - S4354
The GDI Twist-In Door Lock, using an aluminum bolt, securely locks a sliding patio door in a closed or ventilating position. The 1/2 inch (12.7 mm), aluminum bolt is thrown by a simple twist action. It has a white painted Zamac cast housing. Learn More

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$8.99
Window Locks
The GDI Sliding Window "Mini" Nite-Pin features a 1/8 inch (3.2 millimeter) O.D. pin shaft. This pin will fit in casement locking handles as a locking pin, and in narrow rail windows. Learn More

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$3.58
Mill Window Thumbscrew Lock - S4000
Made of heavy duty cast aluminum, the GDI Window Thumbscrew Lock securely locks your window in a closed or open ventilating position with the turn of a single thumbscrew. The aluminum finish blends in with your window frames. The lock makes it easy to have both security and ventilation. Learn More

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$5.99
White Window Thumbscrew Lock - U9802
Made of heavy duty cast aluminum, the GDI Window Thumbscrew Lock securely locks your window in a closed or open ventilating position with the turn of a single thumbscrew. The white finish blends in with your window frames. The lock makes it easy to have both security and ventilation. Learn More

Add to Compare

$5.99
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