SK5 alloy steel forging | wavy blade | 4-speed stretchable SK5 alloy steel forging with overall heat treatment for wear resistance, high hardness, and easy handling of hard tree branches. The wave shaped double-edged mouth effectively resists smooth branches and prevents plant leaves from sliding out of the scissors. It has a 4-speed retractable design with adjustable 4-speed range of 71~88CM, making it easier to trim high branches in the distance.