The Transforming Technologies WB1643 Wrist Strap Set features a 360° conductive contact around the wrist, providing maximum skin contact. The 2.5 mm polyurethane coil insulation assures excellent coil memory. A swivel-type banana plug increases coil life and prevents cord tangles. It uses hypo-allergenic silver-plated nylon thread for conductivity and it has a maximum resistance of 160 ohms.