Robertson S3 Insert Bit, 1″, 1/4″ Hex Drive – Eclipse S3X1

Eclipse S3X1 — Robertson S3 Insert Bit, 1″, 1/4″ Hex Drive

The Eclipse S3X1 is a professional Robertson (square) driver bit designed for reliable engagement with S3 square-head fasteners. Its 1″ insert length pairs with a 1/4″ hex shank to fit standard bit holders, power drivers, and hand tools used across job sites and service benches. Using the correct S3 profile helps reduce cam-out, speeds assembly, and improves fastener life compared to mismatched drivers. The compact insert form factor offers better access in confined spaces, making it a smart choice for panel work, field terminations, and fixture installs. Technicians and assemblers appreciate the consistent fit that supports repeatable torque and clean finishes. Whether you are outfitting a service kit or stocking a production cell, this bit provides the straightforward, dependable performance required for daily use.

Available for quick pickup at our Mesa, Arizona counter and fast shipping to Phoenix, Mesa, Chandler, Tempe, Gilbert, Scottsdale, Glendale, and customers nationwide.

Key Features:

• Robertson (square) bit profile, size S3
• 1″ insert length for compact access
• 1/4″ hex shank compatible with standard bit holders
• Insert-style form for stable, positive engagement in square screws

Specifications:

• Manufacturer: Eclipse
• MPN: S3X1
• UPC: 0617293019888

Typical Applications: Field installs, low-voltage and AV terminations, panel assembly, fixture mounting, OEM production lines using Robertson screws, and MRO repair tasks where a short, positive-fit bit is required.

Installation Example: A low-voltage technician drives S3 square-head screws to secure a surface-mount enclosure; the 1″ insert bit in a standard 1/4″ holder provides firm engagement and reduces cam-out when working close to corners.

Tri-Tek Electronics is an authorized distributor of this product with full manufacturer warranty support and nationwide availability.