DMT Diamond is a portable sharpener for home or in the field. Rods and hand guide store within its handle for easy storage and carry. Easy dial angle guide for 5, 10 and 20 degrees. Rods 2.83 inch. Model itself is 6 3/16 inch x 2 1/4 inch x 1.5/16 inch. Sharpening rods made in USA; other components made in China.Fine diamond for a razor sharp edgeLoosen knob to open and adjust angle placement of rodsSharpen heel to tip with knife each side sliding down and across each rod or at intersection of the two rods for easy pull throughEasy dial angle guideDurable construction will provide years of performance and reliable serviceWARNING: use of this product can expose you to chemicals including nickel which is known to the State of California to cause cancer. For more information go to www.p65warnings.ca.gov.