An assemblage of modified bone remains from the site of Dos Pilas, Guatemala, in the southern Maya lowlands, is used to describe the raw materials, tools, techniques, and reduction strategies of Classic period Maya bone working. Most Maya bone artifact assemblages are not closely associated with production locales, are sparsely distributed across sites (rarely more than a few per household), and include primarily finished artifacts. In contrast, this large collection includes high frequencies of debitage from all stages of artifact production in a single spatially and temporally discrete locus-a residential group close to the main plaza of the site and occupied both before and after political disintegration of the Petexbatun hegemony. Comparative Petexbatun materials are used to suggest that although the Dos Pilas assemblage is unusually dense, the methods used by the bone crafters in this complex were similar to those used in all other periods and locations in the region and likely in the southern Maya lowlands as a whole. The Dos Pilas assemblage presents therefore an excellent model for Classic Maya bone-working.