Please ID bucking spikes

[MotorSeven]

Those are pretty neat looking. What is the advantage of having and inner and outer bumper spike? Do they keep the cut straighter with less effort, or is it more leverage, ?
RD

 

[fishhuntcutwood]

Those are pretty neat looking. What is the advantage of having and inner and outer bumper spike? Do they keep the cut straighter with less effort, or is it more leverage, ?
RD

Here's a thread I started a while back. Post #6 explains it well. You'll see them com into use often with trees like western red cedar, which have a good amount of trunk flare. the dog on top may not even be touching the tree, but the bottom dog will be.

http://www.arboristsite.com/showthread.php?t=31040&highlight=big+dogs

 

[046]

I may have a spare set, please send email info for pic's

 

[MotorSeven]

Thanks Fish, that thread covered it well! Sheesh, the accessory list just keeps gettin longer and......
RD