Well, what do you expect a lance to do? Not pierce? Especially when used by a robot?
RD/KP11-JP041 ジョインテック・ラッシュホーン Jointech Rushhorn
Equip Spell Card
[REQUIREMENT] You can equip this to 1 face-up Machine monster you control.
[EFFECT] The equipped monster gains 300 ATK and its attacks pierce.