The TEKTON 3-piece Ratchet Adapter Set features drop forged carbon steel and durable chrome plated finish resists corrosion. A spring-loaded ball bearing retains socket on extension. The adapter set has a lifetime replacement guarantee. Set Includes: 1-piece 1/4-Inch Dr. (F) by 3/8-Inch Dr. (M) Adapter; 1-piece 3/8-Inch Dr. (F) by 1/2-Inch Dr. (M) Adapter; 1-piece 1/2-Inch Dr. (F) by 3/4-Inch Dr. (M) Adapter.