nbsp; Application This is a heavy-duty 10-piece tool set to help remove nuts, bolts, screw heads, studs, etc. nbsp; Premium Material The bolt demolition kit is made of hard alloy, they are of strong strength and long durability. nbsp; Spiral Cut Teeth Spiral Cut Teeth provide positive grip to eliminate rounded or damaged bolts. nbsp; 10 size head Nut demolition kit is suitable for size 9, 10, 11, 12, 13, 14, 15, 16, 17 and 19mm heads. nbsp; How to Use These removal tools can be driven with a wrench or metric socket for quick work. All of these tools are packaged in a case for easy storage and transportation. Features: This is a set of 10 heavy-duty tools to help remove nuts, bolts, screw heads, studs, etc. It is suitable for 9, 10, 11, 12, 13, 14, 15, 16, 17 and 19 mm heads. Spiral cut teeth provide a positive grip for removing rounded or damaged bolts. Made of hard alloy, they are very strong and durable. These tools can be driven with a metric wrench or socket for fast work. All of these tools are packaged in a case for easy storage and transport. Features: Material: alloy The color black 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 stripper kit