10 Pcs Socket Set—help eliminate nuts, bolts, screw heads, studs, etc. 10 Pcs ( two types to choose from - long and short ) — head sizes: 9, 10, 11, 12, 13, 14, 15, 16, 17 and 19mm Spiral cut teeth — provides positive grip for removing rounded or damaged bolts Material — made of premium hard alloy, guarantees strong strength and long life durability Suggestion — our tools can be guided with a metric wrench or socket for faster work