An adjusting device includes a lifting device for adjusting a position of an attachment in use and a locking mechanism. The lifting device is switched between a locking position and a free position under a locking action of the locking mechanism, the lifting device drives the attachment to move to a first position when the lifting device is in the locking position; and the lifting device drives the attachment to move to a second position so as to work when the lifting device is in the free position. The adjusting device has a simple structure, a low production cost, an easy maintenance, and a garden tool using the adjusting device can conveniently and quickly adjust the position of the attachment connected to the garden tool.

A walk reel mower can have a traction frame which carries a traction drive to self-propel the traction frame over the ground by driving laterally spaced transport wheels rotatably carried on the traction frame. The walk reel mower can further have a reel cutting unit having a rotatable cutting reel that is rotated by a reel drive in a first direction for pushing grass against a bedknife for cutting the grass. The traction frame of the walk reel mower can be positioned relative to a support surface such that the transport wheels are placed out of driving contact with the support surface. The traction drive can be operated while the reel drive is inoperative to cause an idler wheel to drive the cutting reel in a second direction to conduct a backlapping operation while the cutting reel is being driven in the second direction.