[DETAIL] modname=ckeditor 1/4" 8mm 12mm 1/2" Router Collet Extension Rod Chucks Holder Adapter with Spring Collet Set Engraving Machine Extension Milling Cutter Features: Router bit extension rod + collet chuck kit for woodworking trimming, milling, engraving machine. Made of high-quality spring steel material, durable and sturdy. The extension rod can eliminate the dangerous of withdrawing the shank from the collet. And extending the router bit to provide the full depth of cut. Make you work better, safer, more efficient and more labor saving. Specifications: Shank Diameter: 1/4 inch, 8mm, 1/2 inch(optional) Material: Spring Steel [ATTRIBUTES] - Degree: R1.0 - Diameter: 1/4 1/2 6mm 8mm - Coating: AlTiN - Degree: R1.0 - Diameter: 1/4 1/2 6mm 8mm - Coating: AlTiN - Origin: Mainland China - Model Number: milling cutter adapter - Type: Face Mill - Material: Tungsten Cobalt Alloy - Overall Length: milling cutter adapter