86611A 11-Piece Deep Impact Socket Set | ¾” Dr. SAE Cr-Mo

86611A Series is built for mission-critical heavy service:

• Forged Chrome Molybdenum (Cr-Mo) Steel: The defining technical feature. Cr-Mo is selected for its superior elasticity and fatigue resistance compared to Chrome Vanadium. This allows the socket to absorb the percussive energy of ¾” drive impact wrenches without fracturing.
• 90mm (3.5”) Deep-Well Architecture: Engineered for “Stud-Clearance” operations. The extended internal depth allows the socket to engage nuts on long-threaded bolts, a requirement for suspension U-bolts, bridge structural fasteners, and heavy machinery axle studs.
• 6-Point (Hex) Torque-Drive Geometry: Precisely machined to engage the flat sides of the fastener. This geometry maximizes surface contact, preventing corner-rounding even when applying the extreme breakout torque required for seized industrial hardware.
• Industrial Black Phosphate Coating: Features a thermal-chemical finish that provides high oil retention for maximum corrosion resistance and a non-glare surface for visibility in high-intensity workshop lighting.
• Safety Retainer Cross-Hole: Each socket base includes a standardized cross-hole for use with safety pins and O-rings, ensuring the tool remains locked to the impact wrench anvil during high-vibration operation.