1、This is a set of 10 pieces sturdy tools to help remove nuts, bolts, screw heads, studs, etc 2、It fits heads sized 9, 10, 11, 12, 13, 14, 15, 16, 17 and 19mm 3、Spiral cut teeth provide a positive grip to remove rounded or damaged bolts 4、Made of hard chrome vanadium alloy steel, they are of strong strength and long durability 5、These tools can be driven with a metric spanner or socket for fast work 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 chrome vanadium alloy steel, 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. Specifications: Material: Chrome 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. 368g Package Included: 1 x 10Pcs/Set Nut Remover Kit Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.