Condition:New Model Number:Boring Head Condition:High quality and brand new Model number:Boring Bar Milling Holder Features 1:Boring Bar Milling Holder Features 2:Boring Tool Holders colour:Silver Material:40CR steel size:Diameter: 50mm Inner hole: 12mm Accuracy: 0.01mm Package Contents: 1 * Boring Head(Not include Boring bar) 3 * Hex wrench Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.