The recoil devices are simply a cushioned impact bar, attached to 1 or more springs, attached to the hand saw.
When using the recoil saw, the recoil is compressed at the end of each stroke. Energy from each stroke is stored and then used in the next stroke. This speeds the transition from one stroke to the next. This also eliminates the effort of stopping each stroke. This makes using a hand saw take less time and less effort.
Keywords: Hand Tool, Hand Saw