The element has one standard screw at the bottom but was installed with two flat head hex bolts which don't fit anything in my tool box. I've a small Black and Decker electric screwdriver I'm sure would do the job but am struggling to find what attachment I'd need to get them unscrewed. The bolts have a hex shape but are small and not very deep mean getting purchase on them is difficult. Any advice or products you could suggest would be a real help. It's a built in and I can't access the back without pulling the whole oven out. All the video's on youtube show oven elements secured with ordinary screws, sadly not mine.