The Injection Fob is a two piece plastic case that replaces the factory case that comes with the vehicle. For Jeep Wrangler JKs 2007-2018 and other Chrysler applications using the same factory fob. Compatible with and without factory remote start (2 different buttons are included). Injection molded of high strength and impact resistant PC-ABS plastic. Instead of an annular snap fit, this design bolts together with socket head cap screws for a more rugged and straightforward approach. Assembly requires 7/64′ allen key (included). Made in USA. DO NOT USE THREADLOCKER SUCH AS LOCTITE ON THIS PRODUCT! Existing key blade, electronics, battery, transponder are reused (not included with purchase) and packaged into the new case, no reprogramming. Re cutting a key is not necessary, however the OEM case must be destroyed to extract the key, as the key is molded into it. This requires a simple cutting procedure, see instruction video (search AJT DESIGN on YouTube). By AJT DESIGN, LLC.