What is the Wiha IP Designation About?

[pistolpete1313]

I'm getting a Wiha Torque Handle Screwdriver and trying to purchase blades for it.

What does the IP refer to? Is it the type of blade that fits into the handle or is it the style of the tip?

Thanks guys.

 

[md21722]

IP refers to Torx Plus rather than regular Torx?