Johnson Hardware Bifold Styrene Door Knob is designed specifically for bifold doors that range from 1-1/8 inches to 1-3/8 inches in thickness. This door knob features a natural finish and measures 1-3/4 inches in diameter, providing a comfortable and practical grip. Installation is straightforward with the included screw and necessary hardware, making it an easy upgrade for your bifold doors. Backed by a lifetime warranty, this knob reliable performance and lasting durability, ensuring smooth operation of your doors. Model Number: 33-PPK2