Double side Diamond blade 150 grit and holder. allows you to attach to the side of any bench grinder with 1/2 inch shaft without removing stone. back side may require sanding or washer depending on depth of cup on your washers 6000 rpm max. I set out to build a unit to fill the gap between much more exspensive units .Can't cut contaminated tungsten as with bigger holder. user assumes all safety responsibility .always wear eye ear and breathing protection. Includes holder and 4 inch blade tungsten and stone not included. free usps priority mail in usa. Made in the USA one at a time by me with USA materials blade imported feel free to contact me with any questions on here thanks for looking :) email me for any extra blades :) or for international orders and always remember customers get replacement blades at a discount contact me anytime for replacements