Description:All the tools are made up of high-quality materials, practical and durableGood toolkit for home sewing machine repairing toolThe screwdriver is quite useful for bobbin case tension adjustmentThe kit includes: 3 x screwdriver, 10 x plastic bobbin, 1 x brushing, 1 x needle threaderMaterial: Plastic, SteelSpecification:Bobbin Size(D x H): Approx. 20.5 x 11.7mm / 0.81 x 0.46inchSmall Butterfly Screwdriver: Approx. 60 x 16.4mm / 2.36 x 0.65inchBig Butterfly Screwdriver: Approx. 82 x 24mm / 3.23 x 0.94inchNeedle Plate Screwdriver: Approx. 30 x 22mm / 1.18 x 0.87inchNeedle Threader Size: Approx. 72 x 9.3mm / 2.83 x 0.37inchBrushing Size(L x D): Approx. 86 x 9mm / 3.39 x 0.35inchPackage Includes:1 Set Sewing Machine Toolkit