Please note that one of the stops does NOT fit, it is. 015 too wide so it will need to be ground down, not sure why it was with this boring head when I obtained it. I believe the shank is a Quick Switch 200, but I can’t say for sure, please see written (approximate) measurements on last pic, hopefully it will help. Holds 3/4 dia bits. Please view all pics as they are part of the description. Please see our other listings. The item “Machinist Milling Tool Wohlhaupter Boring & Facing Head #UPA3″ is in sale since Sunday, September 06, 2015. This item is in the category “Business & Industrial\Manufacturing & Metalworking\Metalworking Tooling\Equipment Specific Tooling\Milling”. The seller is “carolkick032″ and is located in Tewksbury, Massachusetts. This item can be shipped to United States.