Delmhorst Instrument 608 Insulated Pins
The 608 insulated contact pins measure 4 in. overall, and penetrate 3.25 in. Standard on 21-E and 18-ES electrodes, and can be used on roofing, insulation, timber, poles, and EIFS. Also available in 7 in. length with 6 in. penetration as 608/001.