1/4" 8mm 1/2" Shank ER Router Bit Extension Rod Collet Engraving Machine Extension Milling Cutter for Wood

1/4" 8mm 1/2" Shank Router Bit Extension Rod Collet Engraving Machine Extension Milling Cutter for Wood

Note:
Pls make sure the router collet extension be properly assenbled. Please make a note that extension shank should be secured tightly; while collet nut should be tightened only with the same pressure as any router collet.
Please allow 1-3mm differs due to manual measurement.
Start slowly, wait for the balance to improve, you can slowly accelerate,