A nice touch is the drum switch, and you can tell the designers thought about daily use.
2PCS 12V LED Flasher Relay 2 Pin,Adjustable Turn Signal Relay for Repairing
You will find that SICK quality keeps contact bounce minimal and switching clean.
The 40ISR model feels solid in hand, and the pins align well with common sockets.
You will find that the model 7.4.1.7-2 aligns nicely with the terminals and seats without any play.
What stands out about this heavy duty relay is the thicker terminals, which make wiring feel more secure overall.
What stands out about this model is the LAVA branding, which hints at solid build quality.
A nice touch is the DC 12V requirement, since many adapters around the house already match it.
A nice touch is seeing the White-Rodgers mark, which helps confirm you have the right relay for the job.