Replacement blade adapter for select Pulsar lawn mower models. Designed to connect the mower blade securely to the engine crankshaft for proper cutting performance. Compatible with models PTG1220DBM, PTG1220D5A, PTG12212, PTG1221D, PTG1221T, PTG1221DRM, PTG1221TRM, and PTG1221DB. Replaces/compatible with 602110, new part number 100871019.