You are buying four boxes of 100 ( 400 pieces total)Dewalt Masonry Anchor DFM4410050 4mm, fixing hole diameter 8mm, length 45mmDeWALT Hollow Wall AnchorsThe DeWALT HWA sleeve type, hollow wall anchors have been designed for you to use for light to medium loads. The hollow wall anchors are an excellent choice for using in gypsum boards and chipboards.Features and BenefitsPan HeadFully ThreadedScrew can be removed quickly and easilyOnce the anchor has spread, it cannot be pulled back through the s..