●toolant impact hex head allen wrench drill bits. Torsion zone to absorb torque peaks to avoid breakage. For impact driver and heavy screw driving. ●10pcs metric hex bits set-1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm, 6mm, 7mm, 8mm. 1/4” quick release hex-shank, 2” long. ●CNC machined tips, S2 alloy steel body, hardened core to increase bit strength and reduce fracture. Manganese Phosphate surface to prevent rust. ●Strengthened magnetic impact bit helps you easy pick up screws. The magnetism doesn’t decay after multiple uses. ●Widely used in home repairs, automobiles, and other screw driving applications. If you are not fully satisfied for any reason, please feel free to contact us via Amazon for 100% refund or replacement. Don’t forget to follow us on Amazon by clicking our brand name at the top of product page. :)