Leofoto CF-6 Female 3/8" to Male 1/4" or 3/8" Adapter Accessory All Metal (aluminum) Construction - No Rubber or Plastic Parts Converts your 3/8" Female Mounting Socket to a Male 1/4" or 3/8" Stud Includes Strap Boss and Anti-Twist Lock Bolt Diameter: 30mm / 1.18 inches Height: 17mm / 0.67 inches Weight: 15g / 0.53 ounces Includes 1/4" to 3/8" Bushing Adapter and Allen Wrench