The titanium nitride coating ensures these bits have a much greater surface wear resistance compared to standard bits. Internally the bits have a specific torsion zone, an area with slightly higher elasticity, which absorbs the shock of sudden loads. The torsion zone reduces the risk of fracture, especially at high loads. The combination of the two features offers you a bit that will last significantly longer. The set contains a 58mm professional magnetic bit holder plus; 1 x 5.5mm slotted bit, 1 x each Pz1 and Ph1, 3 x Ph2 and 4 x Pz2, and 1 x each Ph3 and Pz3. The bit holder is impact resistant, glass-fibre reinforced polyamide, tough and reliable it will keep the bits safely stored until required.