Features 1、Main accessories of boring and CNC milling machine, such as coordinate boring machine, horizontal boring machine and ordinary boring machine. 2、High quality carbon steel material of the product can provide stable performance 3、Including 9pcs 12.5mm boring cutters, easy to use and replace 4、This tool set contains boring head, boring shank and boring cutter, perfect for the milling machine 5、There is a storage box which you can store the tools, convenient to carry Specification Item Type: Boring Cutter Set Material: 40 carbon steel System: Metric System Specifications: BT30-F1-12-9PCS Boring Head: F1-12 Boring Shank: BT30-1-1/2-18 Boring Cutter: 12.5mm Scale: 0.001" Package List 1 x Boring Head 1 x Boring Shank 9 x Boring Cutter 3 x Wrench