Set of five hardened steel allen bits for electric drills.
Each bit is 2 inches (50mm) in length. These are 1/4" shaft size, and compatible with electric drills and hand tools that accept 1/4" bits.
Sizes include 2.0, 2.5 ,3.0 ,4.0, 5.0mm
The DDM hand tools ( part numbers ca197a and ca197b) are fully compatible.