Charcoal soldering block is the most heat reflective of soldering boards. Great for soldering and for melting small amounts of metal, this block is made from select, close-grained, knot-free hardwood, specially prepared and treated for optimum performance. Charcoal under your flame creates a reducing atmosphere for a cleaner soldering environment. The block reflects heat back to the work for maximum soldering results. Measures 5-1/2" x 2-3/4" x 1-1/4".