Wrench Extender with 3 Pairs non-slip Glove Torque Amplifier Extra Leverage Extension Auto Repair Tools Bar with 1/2" Hole Fit for Drive Click Torque Wrench
Material--Wrench Extender is Made of 40CR alloy steel with high frequency quenching for impact, rust, and corrosion resistance, the hardness is at 38-42Hrc.