Description:

•6.3mm(1/4“)female squareto10mm (3/8″)outsidesquare
•withsecuring ball
•thuscan benutswith10mm (3/8 “)square drivewith aratchet,ratchettorque wrenchwith6.3 mm(1/4“)driveuse
•for allguns,ratchets, torque wrenches,screwdrivershandlessuitable
•material: chromevanadium steel 31CrV3