Profile: Hisco deals with hand tools. We offer four styles of trench shovel blades to accommodate the various needs of underground, irrigation, industrial and utility users. Our guide tip is made of non-conductive, fiberglass filled hard nylon. Our D-Grips, used on short and mid-length handled tools, are made of one-piece high-density nylon. Our rake and hoe handles feature durable polyvinyl butt grips.