HIGH QUALITYMade of hard chrome vanadium alloy steel, they are very strong and durable. This is a set of 10 heavy duty tools to help remove nuts, bolts, screw heads, studs etc. HIGH PERFORMANCEIt fits the heads of 9, 10, 11, 12, 13, 14, 15, 16, 17 and 19mm. Spiral cut teeth provide a positive grip for removing rounded or damaged bolts. These tools can be driven with a metric wrench or socket for quick work. CONVENIENT STORAGEThis time the product is a bolt nut remover tool kit, which has been sold in the form of a box. All these tools are placed in a storage box to prevent damage during transportation, and are also easy to carry outdoors. WIDE APPLICATIONslbrillre Nut remover kit can be used with most tools, such as an impact wrench, air ratchet, hand ratchet or breaker. It is ideal for professional DIYers, car and boat repairers, building contractors, carpenters and homeowners. 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 Package Included: 1 x 10Pcs/Set Nut Remover Kit