Plastic mallet, large size, head size 1 3/4 x 3 3/4 inches, metal shap – Romazone
Garland Yellow Plastic-Head Mallet - RioGrande
The Beadsmith Double Plastic Mallet - Metal Elements - 9.5 inches Wooden Handle - 75mm, 4oz head, 25mm faces - Use to flatten and shape sheet metal and wire with no risk of marring - Amazon.com
Great Neck 8 Oz. Plastic/Rubber Mallet with Tubular Steel Handle - Parker's Building Supply
Nylon Hammer X Large Plastic Mallet 2-1/2" Face Jewelry Metalsmith Forming