FAMAG 3pcs Extenison shank set, 1639503

3 pcs. Set in wooden case IØ 8mm, GL 80, 125, 250. Ø of the shank 10 mm, or 13 x 30 mm. With four attachment screws for fixing. Solid quality. The shank of Ø 13 mm has three clamping surfaces. For the extension of all cylinder boring bits or all tools with Ø of shank 8, 10, 12, 13 mm. Perfect for drilling deep holes, also for turnery. Only limited suitable for drilling end grain (especially hard wood) because there is considerable strain on the drill chuck. Tool steel. In combination with extentions please use less speed