The Matrix Riddle is a plastic outer rim designed to fit into standard 25L groundbait buckets and bowls. It comes supplied with a 4mm riddle, which is ideal for preparing groundbait or riddling maggots. The coated stainless steel mesh helps prevent corrosion, and the mesh inserts can be changed to suit your bait. Different sized mesh inserts are easily clipped into the outer rim, and the whole setup is easy and compact to transport. - Supplied with 4mm riddle, ideal for groundbait or maggots - Coated stainless steel mesh to prevent corrosion - Spare riddles available in 3mm, 4mm, and 6mm - Mesh inserts can be changed to suit your bait - Different sized mesh inserts are easily clipped into the outer rim - Easy and compact to transport