Used to straighten frames forks and other components the park tool frame and fork straightener is a versatile and productive tool the open hook design enables it to straighten not only frames and forks but also cranks and handlebars park tool frame and fork straightener features a controlled way to straighten frames forks cranks and handlebars when feasible nylon coated hook and fulcrum to prevent paint damage the hook has up to 8 inches of adjustment for ideal po