The Spike® anchor is formed with an "s" shaped configuration at the working end of the anchor to create an expansion mechanism

7/8-14 x 2 Grade 5 Hex Cap Screw Plain Domestic USA (15)

3/4-10 x 4 Hex Tap Bolt 18-8 (A2) Stainless Steel

For professional builders working with redwood

3/4-10 x 3 Grade 8 Hex Cap Screw Plain Domestic USA (25)

Annular Cutter Set, 5 Pieces, 2 Inch Depth of Cut, DWC5-530-502 Square Trim-Head Wood Decking Screws 316 Stainless Steel The Spike® anchor is formedAnnular cutters are designed for fast, efficient hole making. Annular cutters cut only that material necessary to produce a quality hole. Works with Hougen Magnetic Drill, Milwaukee and similar machines.. HSS Annular Cutter 5 piece SET 9 16, 11 16, 13 16, 15 16 and 1 1 16" cutting diameter for 2" depth of cut x 3 4" shank diameter with 2 shank flats