Amflo straight-on air line chuck features a small diameter tip that allows this chuck to reach into tight spaces that standard chucks can't get to - perfect for use with custom wheels and/or short valve stems. Cast and machined brass construction, with black anodized tip, allows this chuck to withstand the toughest home garage or shop use. For use with inflator gauges only; chuck does not have it's own shut-off valve and will not work on live air lines. 1/4-18 female NPT inlet threads. Amflo is part of the Plews & Edelman group. Plews manufacturing and sales Corporation was originally founded by R. G. Plews in 1927. At that time, the railroad industry was the primary focus for the company's extensive line of oil cans. As the Transportation industry went from trains to passenger cars and trucks, Plews shifted their focus to developing the tools necessary to service this new mode of Transportation. Fast forward 90 years and Plews has become part of Plews & Edelman. Today, Plews & Edelman is a leading designer, manufacturer and distributor of a broad range of automotive parts and tools sold to the vast majority of mass merchant, retail auto parts stores and wholesale automotive parts and industrial distribution outlets, worldwide.