Key4 Inc. is a distributor of automotive locksmith supplies, serving customers through its online store, Key4.com. The company offers a broad selection of products for vehicle key replacement, programming, cutting, and related locksmith work. Its inventory includes car remotes, key fobs, remote and key shells, transponder keys and chips, key blanks, emergency and insert keys, and flip and universal key blades. Customers can also shop for batteries, key gloves, multi-function keys, and automotive locks.

Key4 supplies tools and equipment for professional locksmiths, including key-cutting machines, key programming and immobilizer tools, lockout and rekeying supplies, Lishi tools, soldering equipment, adapters, and cables. Additional categories include diagnostic devices, immobilizer emulators, software tokens, motorcycle and marine tools, battery service products, and TPMS service equipment. The site features products from brands such as Xhorse, Autel, KEYDIY, Lonsdor, ILCO, and Advanced Diagnostics, among others.

Key4 provides order tracking, customer support, FAQs, and a locksmith Q&A section.