ITEM NAME:SNR0008k11 Threading Boring Bar Turning Tool Holder For 11 IR 1/4 CNC Lathe B6R4 SNR0008k11 Threading Boring Bar Turning Tool Holder For 11 IR 1/4 CNC Lathe B6R4 Specifications: Boring Bar: SNR0008k11 Shank Diameter: 8mm Overall Length: 125mm Min. Bore: 11mm(NOT Included) Blade Pole: vanadium alloy steel Accept Insert: 11 IR Blade screw: M2.5x7 Package Content: 1 x SNR0008K11 Inner Threading Tool Holder 1 x T8 Wrench Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.