Kreg Easy-Set Stop Callar & Material Thickness Gauge/Hex Wrench Kit includes the same Easy-Set Stop Collar and Material Thickness Gauge/Hex Wrench found with Kreg® 300-Series Pocket-Hole Jigs. The stop collar features a convenient window that aligns ly with the engraved markings on the Kreg Easy-Set Pocket-Hole Drill Bit, making it simple to set the bit to the correct depth for 1/2", 3/4", and 1 1/2" thick materials. The Material Thickness Gauge helps you quickly and accurately determine the thickness of your material while also incorporating a built-in hex wrench to tighten the stop collar securely. Additionally, the collar is compatible with all other standard 3/8"-diameter Kreg pocket-hole drill bits, ensuring versatility and ease of use for your woodworking projects. Model Number: