Standard Pack = 1 piece(s). Chuck Size = 8 ; Class = Lathe Chucks & Accessories ; Gripping Capacity External = Minimum .43 / Maximum 7.87 ; Gripping Capacity Internal = Minimum 2.44 / Maximum 7.48 ; Hole Size = 2.362 ; Number of Jaws = 3 ; Trade Name = Atlas ; Type = NBK Super Thin Round Chuck ; Weight = 42 lbs ;