brand. Stainless Steel for superior strength. Extra wide for Stability. Use to convert a 1/4"-20 threaded post to a 3/8"-16 or to convert a 3/8"-16 thread socket to a 1/4"-20. Female 1/4" male 3/8. "Base is 4mm in height.
Diameter: 50mm (2").
weight: 63g ( 2.2 oz). Includes Rubber Washer.