Pros:
+20% resistance against sappers (Either less damage or slower reverse build)
+10% speed boost (To get to your buildings faster)
Cons:
-25% damage
-25 health

Pros:
+20 speed
+40% health
Cons:
-70% damage

+Gain guaranteed melee crit for each sapper destroyed
-25% damage
-No random critical hits

15% sapper resistance.
30% damage reduction.
20% movement speed bonus when sentry, sapper or teleporter is sapped
-10% movement speed when nothing is sapped

reskin

+gain melee crit for each sapper destroyed
-25% swing speed

+100% sapper removal rate [takes one swing]
+Sapper drops as medium ammo pack

-25% melee damage
-15% movement speed while carrying building

+Increased movement and attack speed on wearer while building(s) is being sapped
[Each building sapped adds +15% movement speed, and +10% attack speed]

-Decreased heal and ammo pick up rate on wearer while building(s) is being sapped
[Each building sapped adds -5% heal rate, and -5% ammo picked up]

lol

replaces secondary
+100% damage to sappers
+crits on sapper removal(5 seconds)
+200% damage with crits
-100% damage penalty

The Sapper Eater
Wrench
(+) +75% Damage Bonus vs Buildings
(+) Buildings are 25% More Resistant to other Buildings
(-) -35% Damage Penalty vs Players
(-) Buildings Cannot Use Random Critical Hits






BTW: Sappers Count as Buildings!!!

+Each destroyed sapper gives you 20 health and 20 metal
+Takes 1 hit to destroy any sapper
-Destroying any building (yeah, destroy by enemies counts to) gives you -20% damage vulnerability for 5 seconds. Effect can stucked

Short. Interesting. Enjoy.

Sentries can never random crit, so that's not a downside.

Every destroyed sapper gives 50% metal and +25 health
that may result in overheal
-20 health on wearer
15% slower swing speed

引用自 Delly：

+Gain guaranteed melee crit for each sapper destroyed
-25% damage
-No random critical hits

This is the best. It's like counter-diamondback.