MR1100 Features: Please order the installation pack specific for your board Includes: HD-408-BB is used for boards with item number prefixes: AA, AB, AF, AM, AN, AP, CA, CB, CW, LA, PR, WB, WF, WN, WP. This set includes (8) plastic anchors, (8) L-Clips, (8) drill & tap screws and (8) #10 Phillips screws HD-408-WC is used for boards with item number prefixes: AW, LW, MW, WM, WS, WR. This set includes (8) plastic anchors, (8) drill & tap screws, (8) #10 Phillips screws, (4) 3/4'' L-Clips and (4) #3 Large L-Clips HD-408-AC is used for boards with item number prefixes: AS, MA. This set includes (8) plastic anchors, (8) L-Clips, (8) drill & tap screws and (8) #10 Phillips screws