snap-on type for tightening screws with controlled torque in the cNm and in-lb range for single-use or production tightening in a counterclockwise and clockwise direction with 1/4" internal hex drive (F 6.3 DIN 3126/ISO 1173) stepless adjustment via micrometer scale (rotary scale) a disengagement clutch prevents exceeding the set value the handle shape and surface texture ensure safe and precise torque transfer insert tools: For all 1/4" E 6.3 hex head screws, Phillips, POZIDRIV/SUPADRIV®, slotted, TORX®, hex bits Certified according to DIN EN ISO 6789-2:2017 Deviation ± 6%.