Input Drive Size: 1/4" Drive Shape: Square Length: 50mm Type: 6 Point Socket Output Size: 3/8" Product Dimension (Refer Line Drawing Image): D1 Size: 13.7mm D2 Size: 12.5mm H1 Size: 11mm H2 Size: 40mm L Size: 50mm 1/4 Sq. Dr. Socket 3/8 6 point Length 50mm