The Gilson SS-8R Sieve Shaker obtains accurate, repeatable separations quickly over a broad range of particle sizes and material types. This exclusive action results from perfect circular rotation of the sieve stack and vertical two-way tapping of up to twenty 8-in. test sieves. Its new EZ-Clamp assembly with integral sieve cover slides freely up and down the clamp rods with a simple push, slide, and twist to secure your sieve stack. Sieving just got easier!