1. Material: steel
2. Specification: 3/4/6 inch
3. Length: about 75 mm for 3 inches, about 100 mm for 4 inches, and about 180 mm for 6 inches
4. Shrinkable range: about 53-175 mm for 3/4 inch, 60-195 mm for 6 inch
5. Weight: about 120 grams for 3 inches, 160 grams for 4 inches, 200 grams for 6 inches
6. Purpose: used to disassemble the piston ring
7. Features: durable material, long service life, high strength, with ratchet belt, easy to use