Sequence Boundary The sequence boundary is an unconformity updip and a correlative conformity downdip. Where it is an unconformity, it is a surface of subaerial exposure and erosion; however, the expression of those features in an individual outcrop may or may not be obvious.
The brushless motor provides greater reliability and efficiency for its low weight and size as compared to the brushed motors. Efficiency for the brushless motor is typically between 85-90% while that of the brushed motor ranges between 75-80%.
Matco cordless tools are made by PTI (Professional Tool Inc), a company that Matco is heavily involved with in Taiwan. Matco co-designs the tools with PTI and they are exclusive to Matco. If the tool is red and black, it is an earlier version, but batteries are still available. They are ni-cad.