1/4",8mm,12mm,1/2" shank extension adaptor for engraving and trimming machine
1)Shank sizes: 8mm,1/4",12mm,1/2"
2)Material: 45# carbon steel; Carbide: YG8 or YG6.
3) bits can be re-sharpened.
4) sealed bearings for smooth routing.
5) suitable for chipboard, hardwood or softwood.
6)Color: Red, blue, yellow, black, sand-blasting available.
7)Long using life with good quality and fast delivery.
8)12 pcs different type for different work.