Introducing the NEW Self Lock Evolution series which features improvements to our #1 selling Self Lock series. The Self Lock Evolution features our new High-Viz blade color with the ever popular and much asked for, dual end hook and two sided blade printing. This truly is our most innovative tape to date and will surely be a great addition to any home or job site. The series features 16' x 1", 25' x 1", 30' x 1". The Self Lock Evolution series also features a unique self locking mechanism that allows the blade to extend smoothly, as well as a push button release that insures complete control when retracting the blade.