Size:TA18, TA20, TA23, TA25, TA27, TA30 (6 Pcs) Specification: Type of Shank: 6.35mm/ 1/4 inch hex Size: 1.8, 2.0, 2.3, 2.5, 2.7, 3.0mm Total Length: 2 Inch/ 50mm Material: S2 Alloy Steel Features: Professional and convenient, high efficiency Toughness is good, hard to rupture and wear proof Magnetic bits can easily absorb screws in the installation Fit specialty screws found on cell phones, computers/laptops/ TVs, game consoles, small appliances Widely used power tools, electric screwdriver assembly, electronics industry, household appliances, precision instruments industry, furniture industry screw equipment Made of high-strength durable S2 alloy steel Package included: 6 Pcs triangle screwdriver bits