Get professional results with these Impact Performance Series #1 square (Robertson) insert bits from Irwin. Engineered for maximum durability in high-torque impact driver applications, these bits deliver up to 3X longer life than standard bits.

• Impact-rated for use with impact drivers
• Patented tip geometry delivers superior fastener fit
• CNC machined optimized torsion zone absorbs peak torque
• Heavy-duty cold-forged high-grade steel construction
• 1/4" hex shank for quick bit changes
• 2" length provides extra reach for deeper fastening
• Black oxide finish resists corrosion

Tip: Square drive bits provide excellent grip with minimal cam-out, making them ideal for deck screws and cabinet installation.