Product Details:

Holds Standard Caulking Cartridges
Low to Medium Viscosity Materials
Smooth Rod

This CRL 12:1 Ratio Caulking Gun has the smooth operation of a friction rod, plus a large handle and trigger. Perfect for dispensing low to medium viscosity materials. The strap frame rotates to move the nozzle tip where needed. The spring release plunger lets you load and dispense quickly and easily. The thumb activated instant pressure release button prevents sealant run-on. Includes a built-in ladder hook. 

Additional Product Information:
Caulking Gun Ratios-What does it mean? Extra Thrust!
Today's high viscosity sealants have brought about a new age of caulking guns. The question is, what does the term "ratio" really mean? Quite simply, for every pound of pressure being applied by the user, the ratio is a multiplier of pounds of pressure being exerted on the cartridge plunger. For example, the CRL 7 to 1 Ratio Caulking Gun would provide 7 times the amount of each pound of pressure being applied.
One each per package.