1. This is a double-ended automatic wrench with a magnetic damping adjustment structure on one side. The blades are made of carbon fiber composite material, which is strong and . 2. The wrench is CNC machined from stainless steel, brass and aluminum alloy composite materials, and the is sandblasted and anodized. 3. The contacts are made of sterling silver, and the contact is reliable. 4. Adopt dual 3.5mm audio interface with 1m cable Colour:Blue Material:Metal Package Contents: 1 x Shortwave CW Transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.