Drill sleeves are cylindrical devices used to adapt the shank of a drill to fit into a different size of drill chuck or spindle. They play a crucial role in ensuring compatibility between various drills and drilling equipment. Drill sleeves come in various sizes to accommodate different shank diameters and chuck sizes. The sizing is typically specified in terms of the outer diameter (OD) and the inner diameter (ID).The primary purpose of drill sleeves is to adapt drills with one shank size to fit into chucks or spindles with different size capacities. They ensure compatibility between drills and various drilling equipment, allowing for flexibility in tool usage. Drill sleeves can either reduce or expand the shank size. Reduction sleeves are used when a smaller shank needs to fit into a larger chuck, while expansion sleeves are used for the opposite scenario.