The Borroughs Tool And Equip. Corp. BT-7704 Carburetor CHOKE ANGLE GUAGE is a high-quality hand tool designed for automotive use. Made in the United States by Borroughs Tool and Equip Corp., this carburetor choke angle gauge is essential for adjusting the carburetor choke angle to ensure optimal performance in your vehicle. With its specific manufacturer part number BT-7704, this tool is a reliable and durable option for mechanics and car enthusiasts looking to maintain and repair their vehicles. Thumb screw is rusted but turns freely. In ORIGINAL box with instructions. Please see photos details.