AME Cribbing Blocks are Certified and Tested • Multiple Sizes and Shapes • Interlocking or Aggressive Non-Slip Surface • Non-Conducting Plastic Resists Oil and Most Chemicals • Does Not Splinter Like Wood • Made From 100% Recycled Plastic • 42 Piece Industrial Cribbing Blocks • Black • Includes: (42) 15230 Lanyard Colour Blue