2pc jaws.
^_. Capacity 4" opening   removes and installs overhead valve springs without removing the cylinder head on many cars and small trucks.
^_. Jaw length: 4-1/4, max. opening: 4'', throat depth: 2-7/8''.
^_. Overall dimensions: 5-1/2'' L x 2-1/2'' W.
^_. Shipping weight: 0.95 lbs.