For Pro Only - For contractors, locksmiths, and custom gate builders with the tools and experience needed to modify spindle sizes for specific lock requirements. Spindles must be cut to the correct length after careful measurement. Only works with JOUNJIP Flat Spindle locks and deadbolts - Not compatible with other brands or JOUNJIP Square Spindle locks. Adapts to Thicker Doors and Gates: The longer flat spindles and screws allow JOUNJIP flat spindle locks to fit thicker doors and gates up to around 3.5 inches, depending on the specific lock model. Kit Includes (2) Flat Spindles: 87mm, (2) Flat Spindles: 135mm, (2) M5 Replacement Screws: 100mm, (4) Screw Extension Posts. JOUNJIP's Mechanical Lock Thick Door Extension kit, an exceptional solution for Custom Gates and Doors. This comprehensive kit offers an excellent extension for thicker doors, accommodating a range from 2 1/8" to 4" thickness. It is a must-have for contractors, locksmiths, gate builders, handymen, and gate security personnel who require reliable and robust solutions for their projects. The JOUNJIP thick door deadbolt kit is designed with precision and utility in mind. It comes equipped with all necessary accessories: (2) 87mm (2) 135mm Spindles, (2) 100mm M5 Replacement Screws, (4) Screw Extension Posts -ensuring you have everything needed for a hassle-free installation. This Flat Spindle Kit is an excellent match for those seeking to convert their current door setup to handle thicker doors. It offers deadbolt conversion capabilities, allowing you to upgrade your door security. The JOUNJIP thick door extension kit is compatible with several popular deadbolt brands, making it a versatile choice for various door types and styles. Compatible with JOUNJIP Flat spindle locks **For a full list of Compatible Locksets please reach out to JOUNJIP. Our excellent staff will be happy to assist you with any questions or concerns you may have. Please make sure to check your Lock Manual for dimensions and instructions. The JOUNJIP door deadbolt kit is the ultimate solution for thicker doors, providing superior door security while maintaining a streamlined aesthetic. Its robust design ensures longevity and durability, making it the go-to choice for all your JOUNJIP door extension requirements. JOUNJIP's Mechanical Lock Thick Door Extension kit is the ideal solution for Gate and Door thicknesses 2 1/8" up to 3.5" inches thick. Thank you for choosing JOUNJIP. We look forward to serving you.