WL. Fuller "X" series counterbores are designed to cut clean holes in wood and plastic, and be used with stop collars to control the depth of cut. Counterbores can be used to hide fixtures such as nails, spikes, and bolts.
Allowing them to be sunk far enough beneath the surface to allow for a wood plug to be used to cover the head.
Made of Carbon Steel and heat-treated for long tool life.
1" Diameter
Drill size 7/16"