3/4” socket of strut channel，for 1-5/8" wide strut channel，Lifetime warranty Cr-V heat treated alloy steel forging，strong and long-lasting Universal joint，enables smooth 360 degree rotation，high flexibility, small space can also be operated. 5.2" length，can be used for taller channels and strut Black phosphate conversion coating on surface Patent pending 1/2-Inch Drive 3/4-Inch Strut Socket，for 1-5/8" Wide Strut Channel，Universal Impact Joint，Heat Treated Alloy Steel Forging，5.2" Length