Features: -[S2 Material]: The bit is made of S2 alloy steel, precision forged, sturdy and durable. -[Hardness 58-60HRC]: The bit has a hardness of 58-62HRC, high hardness and not easy to deform. It is mainly used for engineering,  machinery, maintenance of household appliances, electric, pneumatic tools, etc. -[Strong magnetism]: The bit has a strong magnetism, which can absorb large and small screws and is not easy to fall, which is convenient for operation. Specifications: Produce name; 6.3mm series screwdriver bits; Material; S2 alloy steel; Bit hardness; 58-60HRC; Produce model; DL6901, DL6902, DL6903; Type (Options); PH2x50mm, PH2x65mm, PH2x100mm; Rod diamete; 6.3mm; Number; 10 pcs x screwdriver bits; Model; Type; Total length; Rod diameter; DL9601; PH2 x 50mm; 50mm; 6.3mm; DL9602; PH2 x 65mm; 65mm; 6.3mm; DL9603; PH2 x 100mm; 100mm; 6.3mm; Produce Included: Size (Options); Package; 50mm; 10 Pcs x PH2 x 50mm screwdriver bits; 65mm; 10 Pcs x PH2 x 65mm screwdriver bits; 100mm; 10 Pcs x PH2 x 100mm screwdriver bits