Check the listing for details. Lathe Headstock Spindle Adapter Carbon Steel Threaded Chuck Insert Turning Tool. Condition: New. Listed at 20.22 USD. Woodworking Spindle Adapter converts your lathe spindle so that you can use a chuck with a different thread size. Package including:1 Piece. 4 Options: - M33 x 3.5 to M18 x 2.5:· male (external) thread M33 x 3.5, female (internal) thread M18 x 2.5- 1 Inch x 8 TPI to M18 x 2.5:· male thread 1 Inch x 8 TPI, female thread M18 x 2.5- M33 x 3.5 to 1 Inch x 8 TPI:· male thread M33 x 3.5, female thread 1 Inch x 8 TPI- M33 x 3.5 to 3/4 Inch(0.75") x 16 TPI:· male thread M33 x 3.5, female thread 3/4 Inch(0.75") x 16 TPI Notes:We will check the products carefully before shipping. After receiving the item, if you have any questions, please write to me, please do not leave negative feedback and open CASE, I will try my best to help you solve the problem, as a seller, we will be responsible for everything. Contact usIf you need any type of item, please contact us via eBay messaging service. We will respond to you very promptly. At our store, we make every effort to ensure that every buyer's experience is as valuable and enjoyable as possible. You can buy with confidence knowing you're getting a worry-free deal!