Self-tightening. Its 1 1/2 (39 mm) throat clearance fits over a flange or frame horn, or around a lip to pull from behind. Original wedge. Original straight cut tooth design.

Specifications:
Gripping surface: 2 wide (50 mm), 5/8 deep (16 mm)
Overall length: 8 1/2 (215 mm) Weight: 7 lbs. (3.18 kg) Capacity: 6 tons (5,443 kg)