Connector #1: heavy-duty insulation-piercing macro-hook (EZ-Macro-Hook). Housing material is molded nylon and piercing needle is nickel-silver alloy.
EZ HOOK Test Lead with Alligator Clips (18 Long)
E-Z-HOOK Multimeter Test Lead - Insulation-Piercing Macro-Hook Adapter to Standard Banana Plug (4mm) (18 AWG PVC - 48 Long) - Set of 2: Red, Black (633XEL-48R/B) : Tools & Home Improvement
Long Handle Probe to Banana Plug Test Lead - 63340 - E-Z-Hook
E-Z-HOOK Multimeter Test Lead - Insulation-Piercing Macro-Hook Adapter to Standard Banana Plug (4mm) (18 AWG PVC - 48 Long) - Set of 2: Red, Black (633XEL-48R/B) : Tools & Home Improvement
E-Z-HOOK Micro-Hook Double Grabber Test Connector - Set of 10: Assorted Colors: : Industrial & Scientific
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Black Test Clip - EZ Hook - 40mm
Milwaukees Industrial Test Probes attach to 49-77-1003 Industrial Connecting Test Leads. Designed to withstand up to 1000-Volt and 10 Amp, this set of alligator clips used along with 49-77-1003 Industrial Connecting Test Leads and 49-77-1004 Industrial Test Probes are ideal for measuring voltage, current and resistance of most electrical systems. Nothing but heavy duty.
Milwaukee 49-77-1005 Electrical Alligator Clips
619XJL - E-Z-Hook, A Division of Tektest, Inc.
Guide to Test Hooks - Blog - E-Z-Hook, A Division of Tektest, Inc.
Test Leads Archives - E-Z-Hook, A Division of Tektest, Inc.
E-Z-Hook X100W Mini Hook Pincer Probes
The Workshop — Page 42 — Folders
229XL1 - E-Z-Hook, A Division of Tektest, Inc.