Features: Upgrades sliding door security with zinc alloy keepers featuring integrated molding for fractures resistance and frictions to prevent slippage—ideal for patios door lock replacements. Vertical screw slots enable easy adjustments while sturdy construction withstands daily wear, maintaining alignment for smooth sliding door operations. Ideal for homeowners, landlords, or renovations contractors seek high strength hardware to sliding patios door, balconies window, or interior partitions. Secures Type 90 translation door in kitchens, bathrooms, or storage room while preventing accidental shifts in high traffics household area. The sturdy base with screws ensures quick installation, creating seamlessly lock interfaces for enhances child/pet safe. Specifications: Materials: Zinc Alloy Size: 6.1x1.7cm/2.4x0.67inch Color: Black, Silver(Optional) Package Includes: 2pcs Door Lock Keepers note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.