Snap On 5/16" flank drive socket
Model: S421
Snap-on® sockets using the Flank Drive® wrenching system grip the fastener on the flanks/flats which deliver 15–25% more turning power
• Nickel-chrome alloy finish resists rust and corrosion
• Manufactured from the highest quality proprietary steel, providing optimum strength and durability
• 12-point configuration and Flank Drive® wrenching system