Today Mesolithic societies are conceptualised based on the material culture that these people left behind. The study of lithics provides insight into subjects such as transmission and development of knowledge, social interaction, population dynamics and mobility in different landscapes. This project focuses on furthering the understanding of these subjects through studies of the handle core technology. This lithic concept is used in large parts of northern Eurasia, with its most commonly known and researched establishment during the Middle- and Late Mesolithic around the Baltic sea. By increasing the geographical focus, by including Scandinavia, northern parts of continental Europe as well as western Russia, the variations of material culture can be understood in its larger context. The different landscapes in the area create a good opportunity to study the interaction of physical and social Mesolithic landscapes. Through technological studies focused on regional variation, change and trends over time new understandings of the Mesolithic societies can be gained on several spatial and temporal scales. Many studies emphasised the variations of the handle core concept in different areas of Scandinavia. However, it is difficult to discuss these variations in a temporal perspective since the established chronology that relate to this technology is highly problematic. Problems include few dated sites, dates originating from samples detained from unconnected contexts and/or samples collected at sites containing uncertain handle core finds. In northern continental Europe, very few sites with handle core finds have been reliably dated. Therefore, establishing a proper chronological backdrop is important in order to known how, why and when the dynamic Mesolithic societies changed over time and in different areas. The objective of this project is to understand geographical, landscape-dependent and chronological trends through the material by creating a precise chronological overview of the Mesolithic handle core technology. This will be done through AMS-dating, using high quality samples from relevant find contexts, in combination with technological studies of handle core finds. These insights will be used to investigate socio-environmental interactions, change in material culture and the social responses relating to change over time.