The BlueSpot Tools 2 Piece 1/4in Magnetic Quick Adaptor Set is manufactured from heat-treated steel for increased durability and features a quick change 1/4in shank with a magnet for a secure hold. The set contains 60mm and 150mm adaptor lengths. The 150mm extension is ideal for accessing hard to reach areas. Suitable for use with all standard 1/4in Hex driver bits.