This is DMT's custom molded Duo Sharp Base. The base with its 8 rubber feet will remain steady on almost any surface and holds the stone securely in place. By raising the stone up some 2", the base provides knuckle and hand clearance off a table surface making for more comfortable and efficient sharpening.
Diamond Machining Technology, Inc. has been producing high quality diamond sharpening tools for over 25 years. DMT offers a full line of performance products to meet virtually any sharpening need for the workshop.