What does the blade drive look like?
This is an example of a blade drive from an Andis AGC clipper, below. Some brands (like Andis), have a single blade drive assembly. For others (like Oster), the blade drive is one of a set of parts. Whatever your clipper brand and model, the blade drive is normally both inexpensive and easy to replace.
When buying a blade drive to change yourself, make sure it's the right one for both your brand and your model of clipper. Different models of clippers even if made by the same brand, can have different blade drives.
Example of an Andis AGC quad blade drive:
Example of a Wahl blade drive lever for a KMSS and KM2:
Search our website for 'blade drive' or find the Spare Parts category (under Clippers) to find the right blade drive for your model. The blade drive is (or should be!), one of the most frequently replaced parts in a clipper.