“Twin Spiral Mixer” is designed and developed by our own technology for the first time in Korea, a new type of concrete mixer patented with innovatively upgraded mixing blades applied. The twin spiral blades can improve mixing ability of concrete mixer by performing faster mixing speed and more uniformed yet better quality ready-mix. Compared to existing mixer blades the spiral blades gently mixes inwards in circular motion, which helps imprevent less mortal coating and less abrasion rates to the mixing tips.