Set of five hardened steel allen bits for electric drills.
Each bit is 6.25 inches (160mm) 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.
Note: These drivers (due to their long length and very small tips) should not be used for initial loosening or final tightening. They will break if subjected to too much pressure. They are great for reaching tough areas and making bolt removal simpler and faster, but do require care when using.