Brand Name: FastenMaster;Sub Brand: LedgerLok;Callout Size: No. 3;Length: 3-5/8 in.;Drive Style: Hex;Head Type: Hex Washer Head;Finish: Galvanized;Product Type: Deck Screws;Container Size: 50 per box;Number in Package: 50 each;Self Drilling: Yes;Thread Type: Coarse;Self Tapping: No;Driver Bit Included: Yes;Packaging Type: Boxed;Material: Steel;Indoor or Outdoor: Indoor and Outdoor;Designed to attach deck ledger boards to a house structure;No pre-drilling;Large washer head design for increased holding power;Faster, easier and stronger than 1/2 in. lags;Highly corrosion resistant;Self Tapping: Yes;Number in Package: 50 pk; LedgerLok is a code-compliant structural wood screw engineered to fasten a deck ledger board to the rim joist of a house with no predrilling. LedgerLOK replaces lag screws and through-bolts, has been coated with a proprietary three-step coating process that protects against corrosion (even in pressure treated wood) and is ACQ approved. The built-in washer head eliminates the need for an additional washer, saving time and money. The large hex-head allows for greater bit engagement, reducing cam-out.