By using the depth limiting wheel, you can avoid over-tightening and damaging the thread until it can no longer be rotated. Used for installing rivet nuts to form strong threads in thin-walled materials or various materials. Easy to use and plastic handle, comfortable working Comes with multiple rivets (aluminum alloy material), rivet size: M3/M4/M5/M6/M8 It is ideal for general steel and metal work, assembling electrical parts, laying ducts and other work.