I think I bought this at DAISO a long time ago. I haven't used it much. Includes a red plastic holder that can store six sockets. - Number of sockets: 6 - Socket sizes: 5.5mm, 6mm, 7mm, 8mm, 10mm, 12mm - Holder color: Red - Holder material: Plastic - Socket material: Chrome vanadium steel Thank you for looking.