21-E Behind-The-Wall Probe with 4" Pins - Professional Electrical Tester for Wiring, Outlets & Circuit Diagnosis - Perfect for Electricians, DIY Home Repairs & Electrical Inspections

21-E Behind-The-Wall Probe. Also available as the 21-E/001 with 6" penetration, or as the 21-ET with a tapped handle allowing for an extension pole for hard-to-reach areas. 90-day warranty.

21-E Behind-The-Wall Probe with Teflon-insulated #608 pins provide up to 3-1/4” penetration

Test insulation behind drywall, stucco, and roofing materials