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2,3,4,5 and 6 mm hex, flat blade screwdriver and Mavic M7 spoke wrench - 82g. The Critical Mass carbon fiber multi tool provides just the necessary tools in a functionally svelte and lightweight package. Featuring a compression molded carbon fiber handle and 6Al4V Ti bolts to pull it all together, the Critical Mass promises to be tough enough for everyday use yet light enough for a jersey pocket. Available in three flavors, each Critical Mass is made with a special rider in mind.