Siegen power tool bit set colour coded s2 siegen tools s01038 this power tool bit set from siegen has been manufactured from high quality chrome vanadium s2 steel popular range of 25mm and 90mm bits suitable for general workshop use 90mm bits feature no shoulder for easier access to recessed fixings colour coded for guaranteed fast identification includes automatic quick release chuck and 60mm magnetic bit holder contents 25mm bits slotted 4mm x2 5mm x2 6mm x2 phillips 1