When product used in winter, The pipe would be put in the Lukewarm water for heating at first, to avoid burst because for, cold and fragile at cutting, if the edge of a cutter appeared wear and tear at using, loose the fixed screw and buy the same type of pipe blade for change after using, we should push down the handle and spread on rustproof oil, Product apply to rigid plastics pipe of Aluminum plastics pipe, but not to be applied on electric cableline and steel pipe to avoid to cause cutter damaged seriously.