Router bit extension glue chuck converter adapter, converts a 1/2, 1/4" bit with ER20 spring collet

the dangerous temptation to remove the hose clamp, extend the nozzle to provide the full cutting depth. Place the router collet extension into the 6.35 mm router collet and the router bit into the extension sleeve and tighten both.
Diameter: 6.35 mm, Accepted Size: 1/4" and 1/2", Extension Length: 2-1/4". This router collet extension chuck accepts both 1/4" and 1/2" bits for conversion and extension.
High precision, stable performance. Extends your router bit to provide the full cutting depth, for 1/4" and 1/2" bits.
ER20 steel converter adapter and spring clamp for maximum strength and use; ER20 M type chuck key made of high carbon steel, non-slip grip, for ER20 M collet nut.
This router collet chuck provides the depth Additional cutting is needed for many routing tasks. Easy to use and better controlled, it will improve your work efficiency.