Features Large Handle makes it easy to hold the jig in position and to move it as you work. 45 Degree Drill Guide allows easy attachment of decking in tight spaces such as rim joists and to hold boards securely at butt joints. Hardened-Steel Drill Guides hold the drill and driver bits at a precise angle for accurate hole screw placement. Deck Spacers fit between boards to provide consistent 1/4" spacing between deck boards. Stepped Drill Bit and Square Drive Bit have stop collars to ensure perfect drilling depth and screw placement every time. Flat-Bottom Screw Head seats in stepped pilot hole to pull joints tight without splitting. Deck Screws feature self-tapping tips and smooth upper shank to pull deck boards tightly against the joist. Corrosion Resistance is ensured with two finishes- triple-coated Protec-Kote or solid stainless steel.