Design: HSS, DIN 1898/1, type N. Right cutting, surface steam tempered from ∅ 3 mm with precise point geometry. Point thinning according to DIN 1412, form A. Normal angle of rake, core thickness and core gradient. Note: Use for manufacturing our pin hole reamer on Ç 1/141. Application: For producing conical holes 1:50 in one step for conical pins according to ISO 2339 (DIN 1) and ISO 8736 (DIN 7978).