The claw teeth and pry tips are well sharpened to get into narrow cracks. The head design lets you work in corners (e.g., to lift the plate of a wall), which you can't do with a normal wrecking bar, and it allows you to use maximum leverage without stooping or back strain.
They are invaluable for hanging doors. The broad bearing surfaces on both ends reduce marking of material to a minimum. The bars have an excellent strength-to-weight ratio.
Made in Sweden.
Available in four sizes. The smallest is useful for everyone; the largest is for serious dismantling jobs.