Robertson S1 Insert Bit, 1/4″ Hex Drive, 1-15/16″ – Eclipse S1X1-15/16

Eclipse S1X1-15/16 — S1 Robertson Insert Bit, 1/4″ Hex Drive, 1-15/16″

The Eclipse S1X1-15/16 is a Robertson (square) S1 insert bit designed for controlled fastener engagement in assembly, service, and field installations. With a 1-15/16″ overall length and 1/4″ hex shank, it seats securely in common quick-change bit holders used with cordless drivers and hand tools. The S1 tip geometry matches corresponding square-drive screws to deliver positive drive and reduce cam-out when setting or removing hardware. Its insert-bit format keeps the profile short for access in tight spaces while maintaining the reach required for panels, fixtures, and equipment hardware. For installers and technicians, the single-bit approach simplifies crews’ tool rolls and OEM kitting without sacrificing compatibility across 1/4″ hex systems. Constructed from S-2 tool steel and hardened to HRC 59–61, it balances durability and bite for consistent torque transfer over repeated cycles. Whether you are servicing low-voltage infrastructure or general electronics, this bit supports clean, reliable screw driving that helps protect finished surfaces. Available through our Mesa, Arizona retail counter and serving Phoenix, Mesa, Chandler, Tempe, Gilbert, Scottsdale, and Glendale, with fast nationwide fulfillment.

It is compatible with standard 1/4″ hex magnetic and non-magnetic bit holders, extension bars, and torque-limit handles used across service kits. The S1 size is commonly paired with small square-drive screws found in cabinets, junction boxes, and equipment trim. Keep a few on hand to replace worn bits and maintain precise, wobble-free drive.

Key Features:

• Robertson (square) S1 tip size
• 1-15/16″ overall length for added reach with compact profile
• 1/4″ hex drive; fits common quick-change bit holders and drivers
• S-2 tool steel construction; hardened to HRC 59–61
• Insert bit format for removable-bit systems

Specifications:

• Manufacturer: Eclipse
• MPN: S1X1-15/16
• UPC: 0617293019857

Typical Applications:

• Field installers driving S1 square-drive hardware in junction boxes, equipment trim, and backboard mounting
• Low-voltage, AV, and security technicians working in tight spaces and service panels
• OEM assemblers and kit builders standardizing on 1/4″ hex insert-bit systems
• MRO teams maintaining facility hardware and shop fixtures
• Electronics hobbyists and repair benches needing precise square-drive engagement

Installation Example: A technician mounting a small control enclosure to plywood uses the S1X1-15/16 in a 1/4″ quick-change holder to set #6 square-drive screws flush without cam-out, even near adjacent conduit where space is limited.

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