Thumb lock is simple, solid, practical, nice-looking, no paint falling and widely use, which can be used for door and window perfectly. Barrel bolt is premium, stable, anti-rust, sturdy and compact design, which is durable and easy to install. It is made of high quality aluminium alloy material. The length of the thumb lock is 5.7cm, the width is 4.37 and the height is 3.7cm. It is perfect for window, door using and etc. Item Name: Thumb Lock Material: Aluminum Alloy Features: Stable, Anti-rust, Sturdy Colors: Black, White, Silver Size Details: 5.7cm x 4.37cm x 3.7cm/2.24" x 1.72" x 1.46" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Set of Thumb Lock 4 x Screws