Greyhound Premium Reverse-Thread Screws score number one in our comparison studies of popular trim screws. Their performance was unbeatable in both interior and exterior carpentry applications. Premium Reverse Thread Trim Screws by K9® offer these key features:
- Quick Bite Tip
- 3X ceramic protection
- Anti-slip bit pocket
- T10 Power Bit included in every box
- A slightly larger head diameter
- Interior and exterior options

Greyhound’s Quick-Bite Tip self-taps quickly and will not split your material. Also, no dimpling or mushrooming when you install with a power tool. W-cuts in the helixes of the tip ensure that no pre-drilling is needed and installation is fast!
A triple ceramic coating makes them stand up to corrosion in outdoor applications. The Greyhound comes in three colors. Tan ceramic which is perfect for exterior trim and railing. White ceramic is especially useful in exterior composite applications. And, yellow zinc works best in most interior applications. Case hardened steel forms the core for all three varieties.
Our Reverse-Thread Trim Screws sport a slip-proof power bit pocket which makes these screws super easy to install. This superior six-lobe drive fits with a magnetic power bit (included in every box) preventing slipping and cam-out.
Greyhound Trim Screws have a slightly larger diameter head than other trim screws and this provides some key benefits. The larger head-size guarantees more support and longevity in freeze-thaw climates and makes them easier to grab. However, even though they have the slightly larger head, they still hunker down into your material for a concealable profile.

Just a couple more things that are great about these trim screws: The reverse threading at the top ensures strength and stability in your final project. Your deck material will fit firmly against the framing forming a nice strong joint. And lastly, the screws come in weather proof containers which we sure appreciate!
Greyhound Trim Screws are ideal for baluster, trim, and window extension jamb installation, rail cap details and general purpose applications with both composite and treated lumber. Across the board, these screws score highest with their fast installation an ease to use.