The models being recalled include: Model number 20199 with serial numbers ranging from 313000101 to 313020271; model number 20200 with serial numbers ranging from 313000101 to 313007366; and, model number 22200 with serial numbers ranging from 313000101 to 313007146.
There are about 34,500 in the United States and 1,600 in Canada.
The company has received 10 reports of blades breaking, but no injuries have been reported.
