Punch hole in a LP jacket what does it mean?

StarTech 2 Port USB LP Slot Plate Adapter lp slot Riser with Two x8 PCIe Gen4 LP , Customer Install lp slot Riser with Three PCIe Gen3 slots 1 x16 FH 1 x8 FH and 1 x8 LP at least 2 processors R740XD CusKit Dell Part 330-BBLT

long slot kitchenaid toaster 9-pin Serial to 10-pin Header Slot Plate with Low Profile Bracket - Serial panel - DB-9 - 10 pin IDC