Titan, part number 32973. Application Guide: 3/8" (F) to 1/4" (M) Socket Adapter 1/4" (F) to 3/8" (M) Socket Adapter 1/2" (F) to 3/8" (M) Socket Adapter 3/8" (F) to 1/2" (M) Socket Adapter Free Shipping is for continental USA only. If you live in Alaska, Hawaii, or PR please contact us for a shipping quote before bidding. All items are sold as shown. Since we offer free shipping we will ship the items the cheapest most cost effective way possible.