This Magnetic Socket Organizer (for Metric sockets) can store up to 18 of your 1/2 in. drive metric sockets plus 1 adaptor. Give yourself the neatness and organization you deserve. This magnetic socket holder and tool organizer is engineered with a strong ferrite magnet base that securely holds your sockets in place. Holds 18 1/2 in. drive sockets and 1 adaptor.