Top quality Irwin - owned by Dewalt, bits are Joran made quality (all same group of companies)
Reduced shank so can fit into a standard chuck
up to and including 16mm are a 10mm (3/8" shank diameter)
17mm and over are 13mm (1/2" shank diameter)
All individually retail packed new and unused
These are the much better quality professional range and not to be confused with the cheaper jobber black range bits
FREE postage