Features: Rivet post pressure expands legs for fast and permanent fastening. Used widely for car fender, bumper, door or other car surface. These rivets are made of the plastic material, fit 6mm diameter hole. Specifications: Condition:100% Brand New Material: Plastic Head Diameter(Max):11.2mm/0.44" Total Length:20.3mm/0.79" Stem Length:8mm/0.31" Color: Black Dimensions: 25 x 20mm/1 x 0.8 inches(L*D) Fit Hole Size: 6mm/0.24" Notes: Please allow 1-2mm deviation due to manual measurement. Please understand that the pictures are slightly different from the actual item because every monitor is not calibrated same. “WARNING: This product contains a chemical known to the State of California to cause cancer.” WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.”