The Sealey 10 Piece Magnetic Fastener Retainer Socket Insert Set is a practical socket accessory designed to prevent fasteners from dropping during installation or removal. These magnetic inserts transform standard or deep sockets into magnetic fastener holders, improving efficiency when working in awkward positions or confined spaces. The inserts simply push into existing sockets to create a magnetic grip that securely holds nuts, bolts and fasteners in place. This magnetic retention is particularly valuable when working overhead, in engine bays, or anywhere access is restricted where dropping fasteners could cause significant delays or make retrieval difficult. The set includes ten metric sizes covering 10mm through to 19mm, providing comprehensive coverage for the most commonly used socket sizes in automotive, mechanical and general maintenance applications. The inserts are compatible with both standard and deep socket configurations, making them a versatile addition to any professi