1/4 inch Router Bit Set, 15pcs 6.35mm Shank Tungsten Carbide Tipped Router...

Features: 1. YG8 alloy cutter head, more durable and sharper 3. Suitable for all kinds of cutting machines and large engraving machines 5. Material: Tungsten Steel. 【Easy to Use】- The size of the cutter head and the cut shape are attached to the paper card at the back of the box, so you can quickly find the one you need.

eBay