The Pengo core barrels are available in two configurations: standard and heavy-duty. The standard features of the core barrel are Strata^® SR-100 teeth, outside wear pads and guide bars. The heavy-duty core barrel features a robust top plate with full-length gussets and a 1 1/4" thick core ring. The addition of the top plate sets this apart from the standard barrel, as it can withstand more crowd force, and with the help of the thick core ring, power through the toughest drilling conditions.