The Adir Hanging Clamp Wrench is the perfect accessory for tightening and loosening blueprint hanging clamp knobs. It can clamp up to 100 sheets of full-size drawing paper. Plus, it takes only a maximum of one to 1-1/2 turns to securely clamp the sheets.
This clamp wrench is made from a strong, sturdy stainless steel that is fully compatible with most manufacturers such as PlanHold, Mayline, and Adir. Also, it comes with a blue thermal-set grip for easy tightening or loosening wing knobs. It features a hexagon hole used for the removal of broken wing knobs.