VIAIR RV Winterization Kit Pneumatic Tools Internal parts last longer and Internal parts last longer and the inside of the tool is kept clean Beefed up contact arm provides greater protection from the breakage due to nail jams and accidental dropping of the tool Heavy duty driver blade Anti double fire nose prevents a 2nd nail from accidentally being shot when the 1st nail is firmly pressed up against the wood surface Anti dry fire mechanism senses low nail level to prevent damage to the tool from dry firing Precision placement nose exposes the nail tip to allow the precise placement of fasteners into the connector holes 25 in Tool weight (lb For more information VIAIRs convenient and easy do it yourself winterization kit protects your RVs water system from freezing during the long winter months