The Guru Multi Riddle, 3 interchangeable mesh riddles with 3mm, 4mm and 6mm size options. Designed as a perfect fit for Guru and Mainline 18 Litre buckets clicking securely straight on top. Ideal for cleaning maggots and removing lumps from groundbait mixes. The discs which make up the riddle simply lock into the riddle body, staying firmly in place. To remove, simply turn over and push the disc out.