Blood in my hands

I got a cut on my right hand middle finger. As I hanged the key to its key holder I was not able to see that there is a pin that protrudes in its key holder, as I pull down my hand and leave my keys, a tiny pin inserted my middle finger skin and blood droop suddenly. I immediately washed my hands with running water and applied an alcohol. I should get this dangerous key holder of mine so that it could not do harm to myself and for safety reasons.