What tool is best for achieving a straight line when cutting hair?

The best tool for achieving a straight line when cutting hair is regular scissors. This tool is designed to create clean, precise cuts, allowing for a straight line to be formed easily. Regular scissors have straight blades that can effectively cut hair strands uniformly, making them ideal for blunt cuts and straight lines.

In contrast, texturizing shears are designed to add texture to the hair by removing bulk or creating soft layers, which can compromise the straightness of the line. Razors, while useful for creating softer, blended lines, can lead to a feathered effect that may not result in a perfectly straight edge. Clippers are primarily used for fading and shorter haircuts, offering a different cutting technique mainly focused on uniform lengths rather than creating sharp, straight lines. Therefore, regular scissors are the most appropriate choice for ensuring a straight line in hair cutting.