I use a 10 inch case hardened locking screw that has a multi star bit that drives it in . You need a 18v cordless drill and the right bit to take it out. They have to go through a lot of efffort to remove it . I havn't lost one yet that was put on this way . I get them through my lumber yard they are put out by Fasten master
No Predrilling. Stronger than 3/8" Lags. Non-Counter Sinking Head.



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Product Description:
The FastenMaster HeadLok is a heavy duty wood screw that does it all and won’t counter sink. The HeadLok offers higher design shear than 3/8” lag screws…and no predrilling is needed!* HeadLok zips right in and is ideal for many wood to wood applications including decks, fences, SIPs, kitchen cabinets and more. *Caution: Predrilling is required when fastening within 3-7/16” of end or 1-3/4” of edge of beam. All fastening patterns and procedures must comply with building
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