Precision design with an adjustable length feature for woodworking. The guide carriage features deep precision slots for secure and accurate guidance of the saw blade, which glides vertically on two strong pairs of round rods of the pivot rail. The pivot point of the pivot rail is mounted in a robust steel pivot pin with an adjustable segmented arc guide. The segmented arc allows for precise centering for temporary uses at 90°, 45°, 36°, 30°, and 22.5° cutting angles and can be adjusted to any other angle based on a template. The clamp saw comes with a ready-to-use saw blade for wood and can be hung on a ring at the front guide carriage when not in use, with automatic release during cutting. Quick and easy saw blade changes can be made by loosening the wing nut under the handle.