DEWALT DW5848B-Spade Drill Bit For Masonry, 4-InchDEWALT DW5848B 4 1 2" Clay Spade SDS MAX Bit: This clay spade can be used for "trenching" or digging clay, gravel, hard packed earth, etc. This bit features fully hardened steel body which delivers increased life and durability. 4" length. Includes 1X DEWALT Spade Drill Bit For Masonry, 4 Inch Features Fully hardened steel body delivers increased life and durability.