12 Pieces Screwdriver Tips With Magnetic Triangle S2 Stal 1/4 Hexagonal Grip 50 Mm : Made of high strength alloy S2, very durable Hardness is good, increases and increases for improvement Magnet drill bits, in installation can easily absorb screws Suitable for installation in pneumatic screw driver, electric screw driver, Cordless Drilling Machine with Wind Plot Widely wire in power tools, electric screwdriver assembly, electronics industry, household appliances, embedded instruments, screw connector in furniture industry Specification: TA18 height of the middle triangle is 1,8 mm height of the middle triangle is 2,0 mm TA23 height of the middle triangle is 2,3 mm height of the middle triangle is 2,5 mm TA27 height of the middle triangle is 2,7 mm TA30 height of the middle triangle is 3,0 mm size: Size: approx. 100 x 68 x 6.4mm / 3.93 x 2.67 x 0.25in contains: 12 pieces of screwdriver bits