The heavy duty nut splitter is designed for the safe removal of corroded or damaged nuts while bolt threads remain intact. You can use these splitting tools to cut damaged nuts off, then solve the difficult problem of removing. The nut splitter is made from premium steel, of high hardness and long durability. You can just rotate the nut splitter bolt to work on the target nut. A wrench might help you to do this work then. It is suitable for splitting and removing rusty broken, damaged, corroded, stuck nuts. Condition: 100% Brand New Material: 45# Steel Type: #1, #2, #3, #4, #5(optional) Size: (L*W) #1: 7.5*2cm/2.95*0.79in #2: 10*3cm/3.94*1.18in #3: 13*4.5cm/5.12*1.77in #4 : 14.5*5.5cm/5.71*2.17in #5: 7.5*2cm/2.95*0.79in, 10*3cm/3.94*1.18in, 13*4.5cm/5.12*1.77in, 14.5*5.5cm/5.71*2.17in Nut Splitter Bolt Diameter: 12mm(#1), 14mm(#2), 18mm(#3), 21mm(#4) Suitable Removing Nuts Range: 9~12mm(#1), 12~16mm(#2), 16~22mm(#3), 22~27mm(#4) Package Included: 1 Set of Nut Splitters 1 portable case Specifications: Condition: 100% Brand New Material: 45# Steel Color: As Picture Shown Type: #1, #2, #3, #4, Size: (L*W) #1: 7.5*2cm/2.95*0.79in #2: 10*3cm/3.94*1.18in #3: 13*4.5cm/5.12*1.77in #4 : 14.5*5.5cm/5.71*2.17in