Simpson #7 x 2 1 4" Trim Head Screw, Square Drive, 305 Stainless Steel Non Ferrous Aluminum Plastic The left hand rotation designation makes The left hand rotation designation makes this drill a purpose built solution for LH spindle positions on multi spindle boring machines and CNC panel processing centres no workarounds or adapters required to match spindle direction The Simpson HU216 2 Heavy Duty Face Mount Joist Hanger is engineered by Simpson to deliver the additional strength and safety factors demanded by heavy framing applications low profile finish are essential or coastal decks where moisture and salt exposure would cause standard screws to rust and stain the boards