Here is a Used but in good shape TM Smith Quick Change 3/8 Tap Adapter with 3/4 extension built in. TM Smith's website is : http:// /products/catalog_pdf/c2004-pdf/P78.pdf. Says they are compatible with Bilz, Collis, Universal and Lyndex. Shank diameter is 1.2" and the shank is 1.25" long that it would mount into. Check out my other listings as well for many machinery manuals and other industrial surplus items.
(Tm smith quick change 3/8 tap adapter bilz collis ext is the responsibility of Elnora Justice)
firstname.lastname@example.org (Elnora Justice)for more information.