In most cases, the blade angle of a folding knife cannot be easily adjusted. The blade angle is typically set during the manufacturing process and is fixed in place. However, there are some folding knives that come with adjustable blade angles, but they are less common.Adjustable blade angle knives usually require specialized tools or mechanisms to make the adjustments. These may include pivot screws or systems that allow you to modify the blade angle to your preference. However, its important to note that adjusting the blade angle of a folding knife can be a complex task and may require technical knowledge or professional assistance. It is recommended to refer to the manufacturers instructions or consult a professional if you are unsure about adjusting the blade angle of your knife.