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Speed Systems - Isolated 5/16" Hex Shaft with 3/8" Drive, ISE-4
Speed Systems - Isolated 5/16" Hex Shaft with 3/8" Drive, ISE-4
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Speed Systems ISE-4 — Isolated 5/16" Hex Shaft with 3/8" Drive
When you're working on live circuits or sensitive high-voltage equipment, the gap between you and a fault matters. The ISE-4 Isolated Shaft Extension puts a 1000V-rated barrier between your socket wrench and the work — so you can torque with confidence, not risk.
Key Specifications
- Voltage rating: 1000V — engineered for high-voltage work environments
- Torque capacity: Up to 600 in-lbs for reliable, high-load performance
- Drive: 5/16" HEX shaft with 3/8" drive for broad socket and torque wrench compatibility
- Length: 4.5" — provides reach without sacrificing control
- Full isolation: Complete electrical separation between socket and extension
Ideal Applications
- Live circuit maintenance and electrical panel work
- High-voltage utility and lineman applications
- Sensitive equipment servicing where grounding risk is a concern
- Any task requiring IEC 60900 or NFPA 70E-compliant tooling
SKU: ISE-4 | Vendor: Speed Systems | Type: Insulated Tool

Since 1987, Techline Tools has provided a complete line of professional quality lineman tools and safety equipment to keep your crews productive and protected.
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San Antonio Location
4314 Dividend Dr.
San Antonio, TX 78219
(800) 747-3747
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