torque with 40% damage shield penetration - does it work?

[Jurriaan]

I found a torque:

Code: Select all

l) steel torque of charged psionic shield 'Goruroddaldir' [power 51]  (3/20 cooldown)
   Type: charm / torque ; tier 2

When wielded/worn:
Changes stats: +1 Wil
Changes resistances penetration: +5% blight
Spellpower on spell critical (stacks up to 3 times): +4
Spell crit. chance: +1%
Damage Shield penetration: +40%
It can be used to setup a psionic shield, reducing all lightning, blight, mind, and darkness damage by 51 for 7 turns, putting all charms on cooldown for 20 turns.
When used:
100% chance to regenerate 3 psi.

   Dropped by Bethudaba the emperor wight

wielding or unwielding this torque has no visible effect on 'Inspect Player'. Shouldn't that 40% damage shield penetration be visible somewhere? Or is that a 40% increase of my regular damage shield penetration, which might be 0% ?

This is in 1.4.2, BTW.

[HousePet]

I don't think that stat is displayed anywhere.