DEWALT DWA5537DS 1/2-Inch by 6-Inch SDS Plus Depth Setter With DW5537 Solid Carbide Bit Accurate Depth Stop, allows users to adjust depth of drilling in concrete Adjustable for all 1/4-Inch, 3/8-Inch and 1/2-Inch drop-in anchors Proprietary System works with DEWALT 3/8-Inch, 1/2-Inch and 5/8-Inch SDS+ bits Includes a 1/2-Inch by 6-Inch Solid Rock Carbide Bit Four flute design cleans debris out for fast, efficient drilling