Parallel shank twist drills with 12° deg helix. Medium series. Basic dimensions
STANDARD published on 11.2.1983
Designation standards: ČSN 221123
Classification mark: 221123
Catalog number: 25553
Publication date standards: 11.2.1983
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: Czech technical standard
Category: Technical standards ČSN