Teng Screwdriver Magnetiser Demagnetiser Sash Bar Clamps 25mm(L) x 8 Size:Off Set Ring Spanner 1 2 x 7 16in 25mm(L) x 8 155 Pieces Replacement Packs Available Part # Size Pack Qty C155 1 1 4 External 20 C155 2 5 16 External 20 C155 3 3 8 External 20 C155 4 7 16 External 20 C155 5 1 2 External 20 C155 6 5 8 External 10 C155 7 3 4 External 5 C155 8 7 8 External 5 C155 9 1 External 5 C155 10 1 2 Internal 10 C155 11 5 8 Internal 5 C155 12 3 4 Internal 5 C155 13 7 8 Internal 5 C155 14 1 Internal 5 Size: 60 x 30 x 20mm Magnetic Charger Supplied on a key chain this tool can be used to magntise and or demagnetise any type of screwdriver