Non-vacuum only.
Body is made of very durable high strength composite, can isolate under the low-temperature environment for hand influence.
Ergonomics designed, with precise regulate and low vibratin for long time operation without weary.
Lower body with low center designed, while operating can be steady with face.
The bearing is dustproof designing, can effectively lengthen bearing lifespan.
Patent in Taiwan, U.S.A. and China.