The PRS-5 stands using a black vertical tube mates well with the 104 tray. Pre-2002 PRS-5 models use a blue oval vertical tubing that give has marginal but adequate contact with the 104 tray
The 104 tray will NOT fit PRS-2 OS, PRS-3 OS and PRS-4 OS, PCS-9, PCS-10, PCS-11, PRS-25 and PRS-15; For the PRS-25, PCS-9 and PCS-10 Repair Stands see the 106 work tray
A variety of slots and holes hold any tool
Fits all Park tool repair stands except prs-2 OS, Prs-3OS and Prs-4OS and Prs-15