Thank you for viewing. IMPERIAL Ratchet Wrench [Used Item] For sale. ● Dimensions: Square: 3/16, 1/4, 5/16, 3/8 (Especially for valve keys related to refrigeration and air conditioning) ● Used only a few times and is relatively clean. However, please refrain from purchasing if you are overly concerned about condition or are looking for new-item quality. We look forward to hearing from those who understand the above.