Clip-on attachments are for long-necked tools with wide ends, such as wrenches, pry bars, and hammers. The end of your tool needs to be wider than where the attachment point rests, so it won’t slip off. Made of stainless steel, they resist corrosion and are more durable than other attachments. They may slide up and down the tool as you use them. Add threadlocker to the pin to prevent loosening over time.