The Mayhew 4 pc. Heavy Duty Pneumatic Tool Set is 100% made in the USA and uniquely designed for a wide-array of automotive applications - including removing, cutting, trimming, and installing parts. This heavy duty tool set provides the specific tool to get the job done, save technicians time and improve productivity. Each tool in the pneumatic tool set is made of shock-resistant steel that is fully hardened and tempered to provide long-lasting durability. Additionally, they each have a black oxide finish to prevent corrosion and feature a standard .401 turn-type Parker shank for air or zip guns (with the exception of the 8mm valve guide remover which has a .498 turn-type Parker shank). Backed by a lifetime warranty, the tool set saves technicians time by providing them with the tools they need when it comes to specific automotive applications.