By using the depth limit dial, you can avoid overtightening and damaging the thread down to the depth limit. so that it can no longer be turned. Used; to install bolts. rivet to form strong threads in tough materials. thin wall or various materials. Easy to clean. use and plastic handle, happy job Delivered with multiple rivets (aluminum alloy material), rivet size: M3/M4/M5/M6/M8 It is very suitable for general operations on steel and metal ;tal, assembly of electrical parts, laying of channels and other operations.