Handyman Saitou in Another World is a Manga/Manhwa/Manhua in english language, MONSTERS series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Saitou is an ordinary handyman that gets transported to another world where his skills are very useful. He starts to really understand what it means to be needed, as even his mundane tasks and tools have the most unexpected uses in this new world of fantasy!