1/2 12mm Shank Joint Rail & Stile Router Bit Tongue & Groove Large Panel Cutter

Shank: 1/2in ( 12.7mm ) or 12mm. 6mm-100mm Diamond Hole Saw Cutter Drill Bit Set for Tile Glass Ceramic Marble. High Speed Steel Body. Due to the difference between different monitors, the picture may not reflect the actual color of the item.

eBay