Siegen power tool bit set colour coded s2 siegen tools s01035 this power tool bit set from siegen is manufactured from high quality chrome vanadium s2 steel popular range of bits suitable for general workshop use colour coded for guaranteed fast identification and includes automatic quick release chuck contents slotted 3 4 5 6 phillips 1 2 x2 3 pozi 1 2 x2 3 trx star t10 t15 t20 t25 t27 t30 t40 security trx star t10h t15h t20h t25h t27h t30h t40h h