Product DescriptionSpecifications: Material: Chromium Vanadium Alloy Steel Color: Black Fit Head Size: 9mm / 0.35“, 10mm / 0.39 ”, 11mm / 0.43 ”, 12mm / 0.47, 13mm / 0.51 ”, 14mm / 0.55 ”, 15mm / 0.59 ”, 16mm / 0.63 ”, 17mm / 0.67 ”, 19mm / 0.74 Case Size: Approx. 17.2 x 7.9 x 3.5cm / 6.77 ” x 3.11 ” x 1.37 ” Package Weight: Approx. 365g / 660g Features: This is a set of 10 pieces sturdy tools to help remove nuts, bolts, screw heads, studs, etc. It fits heads sized 9, 10, 11, 12, 13, 14, 15, 16, 17, and 19mm. Spiral cut teeth provide a positive grip to remove rounded or damaged bolts. Made of hard alloy, they are of strong strength and long durability. These tools can be driven with a metric spanner or socket for fast work. All these tools are packed in a case for easy storage and transportation. Package Including: 1 x 10Pcs/Set Nut Remover Kit 1 x aluminum box