1:materials: 45# carbon steel, 2:size: 12",14",18",24",36",42",48"...... 3:head treatment:heat treatment,drop forged. 1. Material: #45 carton steel fully forged, chrome vanddium, heat treatment2. SIZE: Any sizes we can make according to the customers' require. 3. Surface: painting, polished 4.many color for customer choose, red, blue, yellow and ect.5.with rubber coated handle Carbon Steel bolt ...