You can also use Goo-Gone it will lift Any label,sticker,picture,black marker marks,etc. great stuff and it will not stane wood,tool handles,or metal tools or tool boxes.
I just hate it when you get new items and they put the bar codes or price labels and it's been on for a long time and it's sometimes real hard to get them off but Goo-be-Gone will take them off without any marks on the tool or other items and all you need is to wipe off the glue and label works great on tool box lables and stickers on bumpers also, I also use plastic jars for storage for small parts but the jar labels can be hard to get off but not with Goo-Be-Gone ,like I said it's great stuff .
Goo Gone is a combination of Citrus Power
http://www.magicamerican.com/googone.shtml
Bj