Gasea 1/2 Inch Shank Bits Router Collet Extension Chuck Rod Engraving Machine

Note: Only accepts 1/2 inch shank bits. Need to tighten with a wrench to prevent the bit from falling off. Made of heavy-duty steel for long life use. 1/2 Inch shank, more stronger and sturdy. 3-1/8 Inch overall length extends your router bits an additional 2-1/4-inch. Eliminates the dangerous temptation to withdraw the shank from the collet. Suitable for automobile manufacturing, mold manufacturing, machinery manufacturing and so on.