Drilling accurate, consistent holes can be tricky, especially on thicker posts. Not to mention the difficulty of holding a drill level and steady. The drill guide provides stability while drilling, so your holes turn out perfectly every time.
The 6-hole template is recommended for larger jobs and professionals with multiple projects. It includes guides for both Bullet tensioner and cable pass-through holes, but works exclusively with 3" cable spacing. If your project includes stairs, consider purchasing both the single and 6-hole drill guides for maximum efficiency.