The BitBuddy comprises seven 29mm x 1/4" hex drive (C6.3) MaxxTor bits (1 x Pz1, 5 x Pz2 and 1 x Pz3) and a magnetic holder. Wiha MaxxTor bits are for use in today’s high performance powered screwdrivers and in particular cordless impact drivers. Standard and normal torsion bits aren't man enough to cope with the forces involved when impact screwdriving. MaxxTor bits have a special torsion zone optimised and adapted for each drive. These bits were independently tested and found to last three times the life of a standard bit and double the life of other high performance impact bits. These are ideal for permanent impact use, designed and proven.