1.  1/2" to 4" Hydraulic Knockout Punch Driver Kit Hole Dies. Hole size from 16mm to 114mm<br> 2.If you need other sizes you need, please contact us.<br> 3.Our company specializes in producing hydraulic tools for more than 15 years. <br> <br> 4.We also offer customized services, just give us the size you want. <br> 5.Our dies are of fair price and good quality.<br> <br> 6.Customized die need  about 3-5days handling time.