These are a specialist mallet designed to reduce damage to the struck object and prevent sparks.

Brass Hammer Mallet for Stamping & Dapping Jewellery Making DIY Arts & Craft Hammer Sheet Metal Chasing Hammers 1lb PTL®
2.0

Brass Hammer Mallet for Stamping Jewellery Making DIY Arts & Craft Hammer Sheet Metal Hammers for Dapping Chasing 2lb PTL®