1. quality material: The adjustable holding tool coupling is made of sturdy and durable carbon steel, featuring craftsmanship, wear resistance, and corrosion resistance. It is resistant to bending and deformation, ensuring longterm usability. The gloves are crafted from lightweight and comfortable nylon material, with a universal size and antipuncture, nonslip design to protect hands from wear. 2. Nonslip design: The Yshaped caliper design allows for easy locking and securing of the machine being serviced. The adjustment screw and handle feature nonslip threading for effortless adjustments and a secure grip. 3. Adjustable wrench: The two movable arms provide leverage. The adjustable screw ensures stable fixation of the arms' angle, with an opening range of 11 mm to 115 mm for broad compatibility. The total length of the coupling holding tool is 29.5 cm (11.6 inches). Both sides of the tool include pin sizes suitable for different flywheel slots. 4. Easy to use: The variomatic locking tool comes with a rotating screw, allowing for quick and easy adjustment of the opening size.