Which type of bit should be used for drilling holes in Plexiglas?

Using a specially modified twist drill for drilling holes in Plexiglas is the best choice due to the material's unique properties. Plexiglas, being a type of acrylic, can crack or chip easily if the wrong type of bit is used. A standard twist drill is not optimized for acrylic and can create excess heat and stress, increasing the risk of damage to the material.

A specially modified twist drill, often with a sharper point and a different cutting angle than standard drills, is designed to minimize this risk. These bits reduce friction and help ensure a cleaner, smoother cut while preventing chipping, which makes them ideal for working with Plexiglas.

Other options like masonry bits, designed for drilling into harder materials such as brick and concrete, are inappropriate for Plexiglas and would likely ruin the material. Similarly, carbide-tipped bits, while suitable for tougher materials, can also create excessive heat and fracturing in Plexiglas. Thus, the specially modified twist drill is specifically engineered to handle the challenges posed by acrylic materials effectively.