Both the T-Blade and Square Blade utilize our built-in Bevel Dial so you can easily adjust the blade up to ~4mm away from zero gap without any additional tools. The blades are also interchangeable and you can use the snap on / off feature to switch between the blades in seconds saving you time and money. Our Square Blade is included with our Trimmer as it works best for general shaving and trimming. The T-Blade is wider with rounded edges which covers more surface area and designs. Sold separately on getbevel.com/tblade.