A shield assembly includes a guard collar and a guard member. The guard collar is disposed around a neck of a gear case of a power tool and includes a first engagement interface. The first engagement interface extends along an outer perimeter of the guard collar and defines a circumferential recess. The guard member includes a second engagement interface for removably engaging with the first engagement interface to secure the guard member to the guard collar. The second engagement interface includes a circumferential engagement member for mating with the circumferential recess of the first engagement interface. The guard member includes a body portion for at least partially surrounding a working member of the power tool.