HAMMER RUBBER MALLET 28OZ. The Kraft Tool Rubber Mallet gives users a smooth stroke when applying forces to objects. Unlike normal hammers, this rubber hammer does not produce sparks when striking metal. Its rubber head is 28 ounces in size and fits snugly into a 10-1/2" solid wood handle. This rubber mallet can be used with Kraft Tool Clinch-on tools to secure in corners or with Tapping Block to hold the installed hardwood floor firmly in place.