Digging Claws

Digging Claws
Type: Droid digging claws
Skill: Strength: digging
Cost: 500
Availability: 2
Game Notes: A droid with digging claws gains a burrow speed equal to one-half its Move (rounded down). It can move at full burrow speed through solid stone and at half this rate through transparisteel.
Source: Ultimate Adversaries (page 156)