Specifications: The screw removal kit is made of high-speed steel, which has high hardness, hard texture, and easy to remove damaged screws. With rust and corrosion resistance on the surface, the cutting edge of the drawing head and long and deep thread have stronger tooth locking force, thus having greater effect on the bolts that are difficult to be removed. The screw extractor bit basically meet all your needs for various screw removal. Type: Screw Extractor Kit Product Material: High Speed Steel Quantity: 33Pcs/Set Applicable to Eliminate Screwdriver or Bolt Size: 1#: Diameter: 6-0.472 Inches 2#: Diameter: 5-0.394 Inches 3#: Diameter: 4-0.315 Inches 4#: Diameter: 4-0.315 Inches 5#: Diameter: 3-0.197 Inches 6#: Diameter: 3.5-0.256 Inches 7#: Diameter: 3.5-0.256 Inches 8#: Diameter: 3.5-0.217 Inches 9#: Diameter: 2.5-0.177 Inches 10#: Diameter: 2-0.138 Inches Features: Durable, Easy to Use, Screw Extractor Box Size: 13cm x 11.5cm x 3cm/5.12" x 4.53" x 1.18" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 30 x Screw Extractor 3 x Connecting Rod