The L15/5 lock is a 5-lobe lock. This design allows for the maximum tensile strength in the shortest distance. L15/5 was designed for fast installation with a primary use in repairing automotive and diesel engine blocks. With an overall length of only 0.793" it can be installed across cracks that run close to and parallel to an edge or obstacle. Use this lock in material ranging from 3/16" to 7/16" in thickness.