On amazon this is listed: ""What's in the Box:
DW618M motor pack, DW6184 fixed base, DW6182 plunge base, 1/4-inch and 1/2-inch collets, wrench, sub-base concentricity gauge, large-hole sub-base, vacuum adapter, and kit box.
Anyone know what this is? Is it the same as the centering tool?
Thanks. Brian
https://www.amazon.com/gp/product/B00006JKXE