Really don't want to spend £16 ish on the driver bits, but I picked up one of these in Tesco tonight for £2.99. A nice little friend for my Gerber...
http://direct.tesco.com/q/R.212-0158.aspx?utm_source=GoogleShopping&utm_medium=GSF_NormalFeed&utm_campaign=GSF_TescoDirect&utm_content=212-0158