Standard Pack = 1 piece(s). Chuck Size = 10 ; Class = Lathe Chucks & Accessories ; Gripping Capacity External = Minimum .47 / Maximum 9.84 ; Gripping Capacity Internal = Minimum 2.83 / Maximum 9.41 ; Hole Size = 3.15 ; Number of Jaws = 3 ; Trade Name = Atlas ; Type = NBK Super Thin Round Chuck ; Weight = 64 lbs ;