Sold as each. 1/2" flush trim. 1/4" shank. Carbide tipped. Razor sharp cutting edges are diamond honed for satin smooth cuts. Optimized hook and shear angles for faster chip clearance and quicker feed rates. Precision ball bearings with dust shields for long lasting performance. Triple tempered shanks for maximum durability. Manufacturer"s number: 23159. Country of origin: China. Distributed by Bosch Tool Group-Vermont Amer.