Description: Made of high strength S2 alloy steel, very . The strength is good, difficult to break, and wear-resistant. Magnetic bits, in the installation can easily absorb the screws Suitable for installation in pneumatic screwdrivers, electric screwdrivers, cordless drill, using wind batch. Widely used power tools, electric screwdriver assembly, electronics industry, household appliances, precision instrument industry, screw equipment for furniture industry. Material: S2 Stainless Steel Hex Shank Size: 6.35mm (1/4") Bit Specification: & Delta; 18; & Delta; 20; & Delta; 23; & Delta; 27;& Delta; 30 & Delta; 18 average triangle height is 1.8mm & Delta; 20 average triangle height is 2.0mm & Delta; 23 average triangle height is 2.3mm & Delta; 27 average triangle height is 2.7mm & Delta; 30 Average triangle height is 3.0mm Total length: 50mm Quantity: 1 set (5 pcs) Note: Please allow 1-2mm differs due to manual measurement, thanks. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you! Package Included: 1x1.8mm Screwdriver 1x2.0mm Screwdriver 1x2.3mm Screwdriver 1x2.7mm 1x3.0mm Screwdriver