— Model: 1/4" 3/8" bit socket (not removable)
— Material: Bit is S2 steel, sleeve is chrome vanadium steel CRV
— Head type: POZI
—  Specification: (1/4") PZ1-PZ3(3PCS)
(1/4") PZ1
(1/4") PZ2
(1/4") PZ3
(3/8") PZ1-PZ3(3PCS)
(3/8") PZ1
(3/8") PZ2
(3/8") PZ3
—  System: Metric
—  Category: Standard
—  Purpose: Use with tools such as ratchet wrenches, bending rods, extension rods, pulleys, etc.