5Pcs set Router Bit Extension Rod Collet Extension Chuck Converter ER20 Spring Collet Set ER20M Wrench Nut(12.7mm 1/2in Shank )

1、Stable Performance: The router bit collet uses it to achieve the full depth of cut when processing dovetail splines which is very suitable for a variety of woodworking. 2、High Quality Materials: This chuck is made of industrial grade materials with high accuracy sturdiness and durability and long service life. 3、Easy To Use: Put the router bit collet extension handle into the router bit collet put the milling cutter drill bit handle into the extension chuck and tighten the two. 4、Good Packaging: Each chuck is marked with a size and is well packed in a separate protective container with a label so it is easy to distinguish them. 5、Wide Range Of Applications: These kits are suitable for boring milling drilling tapping engraving CNC spindle machine tools and other processing.