ITEM NAME:Multi-functional Stainless Steel Expansion Screw Fasteners Car Repair Bolt A#S Product Description Description: Multi-functional Stainless Steel Expansion Screw Fasteners Bolt Gecko Car Repair Expansion Bolt Specification: Material: high carbon steel Total length 160mm/6.3" Usage method: 1. First drill a hole with a bit of the same width 2. Insert the screw and lock it with a wrench 3. Put on the shelf and put in the flat pad locking screw 4. After use, loosen the nut when taking it out. Tap the screw in with a hammer, and the expansion pipe will be loose, so the expansion screw can be easily taken out. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3mm measuring deviation due to manual measurement. Included: 1 X Expansion Screw.After use, loosen the nut when taking it out. Insert the screw and lock it with a wrench. Put on the shelf and put in the flat pad locking screw. Material: high carbon steel. Included: 1 XExpansion Screw.