The Hammer Bumper
No, the Hammer Bumper does not protect your hammer during unwanted accidents. It does, however, protect your striking surfaces from your hammer. The Hammer Bumper, quite simply, converts a hammer into a mallet. By slipping the Hammer Bumper over any hammer face that is 1-1/8” to 1-5/16” in diameter, you can turn that hard steel or titanium face into a much softer non-marking rubber face.
Why would you want this? Well, instead of carrying around both a hammer and a mallet, you can now carry your hammer and a much smaller, much lighter, Hammer Bumper. I have always been a fan of simple products that make the job a little bit easier; the Hammer Bumpers looks to be one of them. For around $7, this USA made product seems well worth the price.
Hammer Bumper - [:cicn:] Hammer Source