One Quarter To One Half Inch Router Bit Extension Collet Adapter With ER20 Spring Collet And ER20 M Type Nut Wrench Lets You Convert Quarter And Half Inch Shank Bits For Milling Drilling Engraving

Convert 1/4 to 1/2 in router bits with ER20 adapter
✔️ Extends reach to 2.25 in; fits 1/4 in and 1/2 in shanks; ER20 kit

This extension bar converts 1/4 in and 1/2 in shank router bits for milling, drilling, and engraving, using a carbon steel ER20 spring collet and M-type nut wrench. Pack includes: 1 extension rod, 1 nut, 1 wrench, 2 collets.

✅ Shank diameter: 1/2 in (12.7 mm)
✅ Accepts 1/4 in and 1/2 in shanks (6.35 mm / 12.7 mm)
✅ Extend length: 2-1/4 in (57 mm)
✅ Material: carbon steel; rust-resistant for long life
✅ Includes: extension rod, nut, ER20 wrench, 2 collets

💡 What is a router bit extension with ER20 collet used for in woodworking and metalworking? This handy accessory extends reach and accepts standard shanks for flexible setups.

- extends reach for deep pockets and tight spaces
- supports 1/4 in and 1/2 in shanks
- uses ER20 collet for secure grip
- simplifies bit changes in crowded work areas