Fits 1-3/8”(1.36“) OD four-slot castle nuts / DIN 1804 nuts / round retaining nut / castellated collet nut / slotted nut / spindle nut / locknutIts reliable chrome-molybdenum steel composition makes turning easier with consistent, high-performance, making it the go-to tool for all your needs.Designed for efficiency, this lock nut wrench simplifies operations, ensuring easy use even in confined spaces, enhancing your workflow.The torque required may be greater than you thought. This Spanner Tool comes with a 3/8” Ratchet Opening to Assist Turning