Penta Socket Allen Wrench model BW-251 is made for working on padmount transformers and secondary pedestals. A popular member of BugWrench tools, this wrench has a 2” working length of the Hex (Allen) of the BW-251 is just right for the transformer bars with covers. Penta Socket Allen Wrench Insulated BugWrench BW-251 comes with Ratchet Penta fitting with built-in 3/8” hex socket for “Twist-Off” padmount equipment locks and Heavy-Duty Forged 5/16” Hex (Allen) with a 2” working length for insulated or non-insulated transformer secondary bars. This BugWrench has heavy-duty forged Allen head with built in reversing ratchet buttons. The buttons are much easier to operate while wearing gloves, than the lever type reversing mechanism on other brand’s heads. -The model BW-251 insulating handle is formulated of a high strength and high dielectric polymer. -A see-through port in the center of the handle to confirm that the two ends are not electrically connected. -The unique design of the handle provides twice the Metal-to-Metal Electrical Isolation compared to other brands (*based on tests on model BW-223). -The handle comes in a High-Visibility yellow color. -high strength and high dielectric