into the slot in a method of drilling a well borehole tool 10 or tool 100 can be provided up hole of a drill bit in the case of a bi center bit its reamer blades can produce a large cutting force the blade of the tool extends from the opposite side and serves to offset the bi center reamer blades cutting force the opposing forces assist in stabilizing the bi center reamer and makes for a more accurate well borehole size in order to further increase hole size and stability in a method of drilling a pair of tools 10 or 100 can be coupled into the drill string up hole from a drill bit when used behind a bi center bit a first of the tools 10 or 100 is aligned with the bi center bit as described the second tool 10 or 100 will have the eccentricity of the body extending in the opposite direction the tools 10 or 100 would drill to the same drill out diameter and serve to act as a two bladed stabilizer as an alternative drilling configuration the stacked tools 10 or 100 could be sized to drill to a different diameter in that situation the distal tool nearer the drill bit would have a smaller drill out diameter than the proximal tool which would extend to the.