These are replacement guides for the model 11122 arbor bit. These are hardened steel and are used to fix the centerpoint of the hole that the pocket cutter uses. These guides are sold in a 3-pack set.
Specifications:
Material: High-speed steel
Compatibility: Works with 11122 Arbor
Includes: 3 Pilots
Design: Guides annular cutter bits for burr-free holes
Origin: Made in the USA