This is a set of 20 pieces sturdy drive socket tools to help remove nuts, bolts, screw heads, studs, etc. 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 bolts. The drive socket tools are made of hard alloy, strong strength and long durability. These tools can be driven with a metric spanner or socket for fast work. size: 17.2 x 7.9 x 3.5cm Material: alloy colour: Black Package Contents: 20 x nut extractor Sponge pad color random,No specification is accepted Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.