1. Accurate Measurements: A raft square is an essential tool for accurate measurements, particularly when it comes to cutting and installing rafters. It helps in determining the length, angles, and pitch of the rafter, ensuring a sturdy roof structure.

2. Easy to Use: Rafter squares are designed to be user-friendly, making them easy to use even for beginners. They come with clear markings and scales that allow users to take precise measurements without any confusion.

3. Time-Saving: With a rafter square, you can quickly determine the measurements and angles required for your project. This saves time and effort compared to traditional methods of measuring and cutting rafters.

4. Versatile: Rafter squares can be used for various applications, including carpentry, roofing, and framing. They are not limited to just measuring rafters but can also be used for other tasks like determining the pitch of a roof or calculating the length of a stud.