The Butt Set Line Cord Bed-of-Nails Alligator Clip by AST Labs is designed for use with Fluke NTS52, TS44, and TS42 models. This high-quality alligator clip features a single large spike with a 1-inch alligator jaw opening for easy and secure connection. The molded strain relief ensures durability and reliability during use. With its bed-of-nails design and reliable features, this alligator clip is a valuable tool for electrical equipment and supply applications.