4PCS Magnetic Insert Adapter Set

 Made of heat treated, durable Chrome Molybdenum Alloy Steel
 Ideal for where space is limited or a regular adapter is not suitable
 Additional magnets help ensure the adapters stay attached to the sockets
 Set includes 1/4", 3/8", 1/2", 3/4" female to male drive adapters
 Black Phosphate Finished
 CR-MO
 DIN3120