The Whirlibit is a carbide inserted chisel tip accessory tool designed by Brunner & Lay specifically for dowel hole drilling. Drilling hole sizes range from 1/2" to 1-1/2", with drilling depths made to your requirements. Whirlibits are available in both Shanked Steel Whilrlibit and C-9 Whirlibit. The Whirlibit is the most economical solution for dowel hole drilling

Shank Size: 1 x 4 1/4
Hole Size: 1"
Hole Depth: 33"