DURABLE: Made of metal material,durable. Multiple pieces can be used side by side, saving time and labor and high efficiency. FEATURE: CNC Multi Station OK Clamp Wedge Expansion Block Machining Center Side Fixed Precision Vice. Scope of use: steel parts, aluminum parts, quick change pallet. The side threaded hole can be equipped with a semicircular jaw to clamp square workpieces and cylindrical workpieces. Please note:Slight color difference or difference in kind, does not affect the use, please do not mind, thank you! Type:M6/M8/M10 Colour:As Shown Material:steel Package Contents: 1 * OK Fixture Only the above package content, other products are not included. Note: Light reflection 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.