Features: Kincrome Impact Sockets & Accessories are manufactured from a high grade Chrome Molybdenum steel (Cr-Mo). ; They are designed to be used with Pneumatic and Power tools where higher torque and force is required. ; Kincrome Impact Sockets and Accessories meet and exceed the following international standards - ANSI & DIN 3121 & 3129; When using impact tools the following safety precautions should be taken: Always use protective eye wear. ; Do NOT hold the Socket or Accessory while the tool is in operation. ; Do NOT use damaged or worn Sockets or Accessories. ; Do NOT continue to hammer a fastener once it becomes tight. ; Do NOT use standard Sockets or Accessories on impact tools. ; Specifications:Size3"MaterialChrome Molybdenum Steel (Cr-Mo)