CHENGYIDA 8 Size Set QUALITY MINI Dremel Hole Master,Coco Bolo Leather Burnisher, leather slicker Tool For edge burnishing, you may want to use saddle soap and water. Glycerin soap also works well. Material: cocobolo burnisher(exotic wood that is one of the heaviest, densest woods in the world. ) Each item differs slightly, as they are made by hand. Colors may vary with the wood patterns. 8 pieces cocobolo burnisher showing in the picture