The material: S2 alloy steel
Application:For 13mm pneumatic screwdriver air tools
Bit type:Short square-neck
Phillips magnetic double-ended size:PH2 PH3
Hex shank size:1/4" ( 6.35mm ) drive
Hex shank lengh:65mm 100mm
It obtain the high hardness and high torque to be more durable after whole body heat treatment,wear resistance
Standard:QB/T 4205-4209-2011
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