Feature●Accompanies all stirrers that accept 5/16" (7.9 mm) diameter shafts●An efficient option for mixing the contents of narrow-necked containers●Fits openings as small as 5/8" (16 mm)●Blends suspensions and stirs both low and high viscosity liquids●Shafts vary in diameter and lengthDescription Swing diameter of chain is approximately 3" (76mm)