Qty 2 of the special bit needed to remove the screws found on the 4160 Holley vacuum carburetors like the 1850 600 and many more. The carburetors that do not have dual metering blocks have a secondary plate that screws to the main body and this is the correct but to remove those. The last picture shows the bits with the screw we are referring to. No screws are included however we do have them in other listings.

Shipped in a box by USPS so they get to you undamaged.

Be sure and check our store for other vacuum secondary service parts.