20 piece set of Addax S2 hardened steel drill bits in Phillips, Pozi and Slotted Heads, HSS drill bits, a hex shank with 50mm screwdriver plus nut driver. S2 steel is a premium alloy steel for exceptional strength and durability ocompared with the standard chrome vanadium driver bits. The HSS drill bits are manufactured from a high grade tool steel. These durable engineering quality drills will give consistent rapid performance into all non-alloy materials. The 135 degree split point eradicates the need to pre-drill and prevents the bit from drifting. The magnetic adaptor allows for easy and quick change for each driver bit. All well presented in a hardened case with sliding lock closure.