how about

double metal put in building
-25% swing speed
-50% build speed up
+25% atack damage
always gets crit by pyro shark because its loose wiring
+5% sentry fire speed when wranguler active
+10% sentry damage sheild it bloks 10% percent of all damage
-50 scrap caried
half capture speed (goes with payload,ctf,and any thing you need to stand next to to cap
lowers mini sentry health by 20

taunt kill close the head of the wrench on a players head