Worm Sifting Screens are specially designed with worms in mind. The screen must travel back and forth at the right angle and speed that will cause the castings and eggs to drop through into the proper chutes and the worms to exit off the end into the worm chute efficiently. The screen material must be smooth so the worms will glide over it without putting them into shock which will slow down their productive activity. Our screen is specially designed with perforated Aluminum using hole staggering on every other row. Castings and eggs fall through while worms glide over the holes headed to the waiting worm feed bucket.