CMI CBLDBT Tin Plated Copper Lay in Lugs Direct Burial Stainless Steel Screw. Used for Bonding metal pool walls and photovoltaic solar panels. Both feature the ability to “lay in” the wire from the side to accommodate attaching at a mid-point of long section, as opposed to pushing the end of the wire into an opening. These Lugs will handle a wire range of 14 – 4. The recommended tightening torque is 50 in-lb.