The Injection Fob is a two piece plastic case that replaces the factory case that comes with the vehicle. For Tacomas and Tundras. Injection molded of high strength and impact resistant ABS plastic. Existing electronics, battery, buttons, and seal are reused (not included with purchase) and packaged into the new case. Instead of an annular snap fit, this design bolts together with socket head cap screws for a more rugged and straightforward approach. Robust key ring hole eliminates the common breakage of the factory fob. Assembly requires 7/64" allen key (included). Made in USA.