1/2 Inch Shank Router Bit Collet Extension Chuck Converter Adapter, Convert 1/2-Inch & 1/4-Inch Shank Bits with ER20 Spring Collet, ER20 M Type Collet Chuck Wrench Spanner -(Pack of 4)

• Shank Diameter: 1/2"(12.7mm), Accept Shank Size: 1/4" and 1/2" Shank, Extend Length: 2-1/4”. This router collet extension chuck accepts both 1/4" and 1/2" shank router bit for converting and extending.
• Converter Adapter and ER20 Spring Collet Made of steel for maximum strength and long life use; ER20 M Type Collet Chuck Wrench Spanner Made of High Carbon Steel, Anti-slip handle Design, for ER20 M Lathe Clamping Nut.
• High precision, stable performance. Extend your router bit to provide the full depth of cut, for both 1/4 inch and 1/2 inch shank router bit.
• Eliminate the dangerous temptation of withdrawing the shank from the collet, extend the bit to provide the full depth of cut. Place the router collet extension shank in the 1/2-inch router collet and the router bit shank in the extension collet and tighten both.
• This router collet chuck provide the additional depth of cut needed for many routing tasks. Easy to use, better to control, it will improve your work efficiency. Package including: 1* 1/2 Inch shank collet extension,1* ER20 1/2 Inch Collet, 1* ER20 1/4 Inch Collet, 1* ER20 M Type Collet Chuck Wrench Spanner.

Specifications: Material: steel Shank Diameter: 1/2 Inch (12.7mm) Hold Diameter: 1/2 Inch (12.7mm) ER20 spring collet : 6.35mm/ 1/4 inch ER20 spring collet : 12.7mm/ 1/2 inch Wrench Spanner: ER20 M Type; High Carbon Steel; Anti-slip handle Design Package Included: 1 * Router Collet Extension 1 * 1/2’’ER20 1 * 1/4’’ER20 1 * ER20 M Type Collet Chuck Wrench Spanner