Fixer hand reamer in HSS made according to DIN 206 UNI 6852 with a number of left helix cutting edges 6° form B from Z=4 to Z=12 according to reaming diameter, with parallel shank in f8 tolerance and with square drive, for holes in tolerance H7 on all ferrous materials, steels, light alloys.

The reamer has an initial input length "li" to facilitate the entry of the reamer into the hole and make the reaming diameter perfectly cylindrical.