3/8" Drive 12-Point Metric 21 mm Flank Drive® Deep Socket | SFM21 Extensions / Wobble Plus • 3/8 external square drive

• 3/8 external square drive on one side and 1/4 internal square drive on other side

mm : 19–21

inches B : 15/16

• Configuration : 1/2" Drive

inches (mm) : 21-3/4 (552)

3/8" Drive 12-Point Metric 21 mm Flank Drive® Deep Socket | SFM21 Extensions / Wobble Plus • 3/8 external square driveSnap on sockets using the Flank Drive wrenching system grip the fastener on the flanks flats which deliver 1525% more turning power Nickel chrome alloy finish resists against rust and corrosion Manufactured from the highest quality proprietary steel, providing optimum strength and durability 6 point configuration and Flank Drive wrenching system Specifications Dimension E, Hex Depth, mm : 15. 1 Dimension C, Bolt Clearance Depth, mm : 48. 1 Dimension