Wide use: Suitable for car manufacturing, mold , machinery manufacturing, etc. More safety: Eliminate the dangerous the temptation to remove the shank from the socket, extend the bit to get the full depth of cut. Safety notice: The extension bar should be tight, but the clamp nut should only be tightened with the same pressure as all milling clamps. note that the extension bar should be well cooled, but the clamp nut should only be tightened with the same pressure as all milling clamps This clamp extension allows you to change milling bits above the table, even without a lift Even if you have a lift, it still makes it a little easier because you don't have to remove the insert ring. They are also good for custom routing tables with extra thick discs, as they provide the extra depth of cut needed for many routing tasks. Features: High precision, stable performance. High resilience and hardness.< br>Durable in use. Make you more efficient in processing products. Suitable for car manufacturing, mold, machine manufacturing, etc. Caution: Make sure the router clamp extension is correctly mounted. Please note that the extension rod should be tight, but the clamp nut should only be tightened with the same pressure as a milling cutter. Specifications: Material: hard alloy Black color Shaft diameter: 8mm Retain diameter: 8mm Total length: 88mm Contents: 8 mm milling socket extension