Input Drive Size: 3/4" Drive Shape: Square Length: 53mm Type: 12 Point Socket Output Size: 1 1/16" Opening: 12pt Product Dimension (Refer Line Drawing Image): D1 Size: 38.5mm D2 Size: 37mm H Size: 19mm L Size: 53mm 3/4 Sq. Dr. Socket 1.1/16 12 point Length 53mm