Rod Thread: 7/16'-20 Suitable for cutter/saw diameter: 22mm 2.R8 shank stub milling machine arbor holder for 22mm gear cutter / face mill cutter / slitting saws. Package Included: 1 x Milling Arbor R8 Shank blade blade shaft short shaft. Rmilmilmilmilmilled bed spax, Suitable for 22mm Gear Cutter / Face Mill / Split Saw. 3. Package include:1 milled rod 4. Stable quality, reasonable price, welcome cooperation with friends at home and abroad! Stable quality, reasonable price, welcome friends from home and abroad to cooperate! 5. Dear friend, choose us your wise choice, welcome you, my friend! Dear friend, choosing us is your wise decision. Welcome, my friend!