Kreg® Each jig position has its recommended drilling depth. To drill in 3/4" material, set the Depth Collar 3-1/2" from the Step of the drill bit using a rule. This will place the tip of the bit approximately 1/8" from the edge of the work piece. Adjust the collar to 3-5/16" from the step of the bit for 1/2" material and 4-1/4" from the step of the bit for 1-1/2" material. Tighten the setscrew with the Allen wrench.