Feature: 1. Solid Lock Bolt: Constructed with a solid lock bolt, this lock is difficult to break and is built to be durable. 2. Adjustable Installation: Easily adjust and install with the included hex screws for a simple and convenient installation process. 3. Zinc Alloy Material: Made with thickened zinc alloy material, this door knob is stable, firm, and resistant to aging. 4. Comfortable Round Design: Designed with a round shape for comfortable gripping, this ball handle serves as a reliable guardian for your home and is easy to install. 5. Single Sided Lock: Unlock from the inside when the door handle rotates, allowing for a quick exit. Cannot be opened from the outside, suitable for recessed and concealed doors. Specification: Item Type: Interior door knob Material: Zinc alloy Weight: Approx. 558g / 19.7oz Color: Black Door Handle Size: 52x62mm / 2x2.4in Lock Bolt Size: 21x9x16mm / 0.8x0.4x0.6in Install Mount Hole Space: 67mm / 2.6in Install Mount Plate Size: 75x22mm / 3x0.9in Insert Part Size: 75x38x12mm / 3x1.5x0.5in . Package List: 1 x Door Knob1 x Lock1 x Iron Sheet1 x Box1 x Rectangle Rod1 x Hex Wrench7 x Screw