It'll only protect the rear of the phone, surely you'd be better off with an Otterbox in your line of work ?
http://www.otterbox.com/apple-iphone-6-cases/apple-iphone-6-cases,default,sc.html
I started from day 1 with a case similar to this
http://www.ebay.co.uk/itm/NEW-Apple..._MobilePhonesCasesPouches&hash=item2c8c847d05
And I work in a very hard environment, and haven't smashed up my phone yet.