10 pieces packag damaged bolt nut screw remover extractor removal set threading tools kit

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..syi