The retractable breakaway point knife is a popular tool in auto glass shops.

Olfa® has now developed a longer breakaway point knife for the auto glass industry that works great for cutting urethane along the bottom of the windshield. The stainless steel housing is incredibly strong! A thumb screw lock allows you to lock the blade in place so it will not be pulled out by the force of cutting urethane. To change a blade simply loosen the blade lock, slide the blade retainer out the back, drop in a new blade and reverse the process.

WARNING: This product contains a chemical known to the State of California to cause cancer. For more information go to http://www.P65Warnings.ca.gov