The Taper Turning Attachment is quite popular and is compatible with all lathe machines. In traditional straight turning, the cutting tool goes parallel to the work axis, resulting in a finished project with the same diameter throughout. With taper turning, the tool gradually approaches the tailstock at a 15° angle. At the end of the cut, it will meet or be tangent to the tailstock. There are two types of taper attachments: single-point and double-point. With both types, when you switch the tool from side to side, it will trace out a helix on the piece being turned. The faster the attachment rotates, the deeper the cut will be. Single-point tools only contact one point on their arc of movement while double-point tools touch a point on each side of their centerline. Double-point tools are more accurate because they make a wider groove for the metal to fall into instead of a deep hole for the metal to drop into. Single-point tools can be used for roughing operations before finishing with a double-point tool. A taper turning attachment uses a ball-shaped tool called a "tang" that fits into a hollow tube called a "bowl". The tool is rotated by a motor inside the body of the attachment. As it turns, the tool traces out a helix onto the piece being worked on.