Aluminum Oxide 4" x 1/2" Round File Made in the USA turning tools are made of

turning tools are made of high speed steel

which are not included

310-16 Attachments Instructional DVD gives you all the details

An extra benefit is that your tools last longer

which gives them excellent contact area with the blade in use

Aluminum Oxide 4" x 1/2" Round File Made in the USA turning tools are made ofAluminum Oxide Stones Aluminum oxide stones excel at refining surfaces, offering a finer finish than silicon carbide stones. Their durability and ability to hold their shape well make them ideal for precision tasks such as sharpening, shaping, leveling, or deburring after machining. These stones are a good choice when a high quality finish and accuracy are critical. Oil Filled These Aluminum Oxide Stones are filled with oil in manufacturing, reducing