MADE OF S2 STEEL MATERIAL:These bits are made of S2 Steel material, large moment of force and high toughness. CONVENIENT TO USE AND NOT SLIP:The magnetic of the bit is convenient to use and not slip. WIDELY USED :With 6.3mm(1/4inch) hex shank, they are widely used on air screwdrivers, electric drills, etc. Easy to carry, economical and Colour:silver Material:S2 Size:200mm long Package Contents: 1 x 200mm*Φ3.0*PH1 Screwdriver bit 1 x 200mm*Φ4.0*PH1 Screwdriver bit 1 x 200mm*Φ4.5*PH1 Screwdriver bit 1 x 200mm*Φ5.0*PH1 Screwdriver bit 1 x 200mm*Φ6.0*PH1 Screwdriver bit 1 x 200mm*Φ4.0*PH2 Screwdriver bit 1 x 200mm*Φ4.5*PH2 Screwdriver bit 1 x 200mm*Φ5.0*PH2 Screwdriver bit 1 x 200mm*Φ6.0*PH2 Screwdriver bit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.