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I used to have a set like this, but without the security bits.Now I have 4 drill indexes; 29 piece fractional, alphbetic,numeric and left hand fractional. I have one high dollarGerman security bit set and a long shank security bit set.Nothing pisses me off more than knowing that I can solder ina new fuse on a computer power supply but not being able todisassemble the case! Almost all of my cordless tools andchargers have security screws. I highly recommend a set ofsecurity bits. If it is something like a blown fuse or coil,you are out almost nothing if it still does not work.
I had the 175 piece kit like this. It didn't have the drill bits or allen wrenches but it had a vast assortment of bits. It had allen bits in standard and metric, nut driver bits, bristol bits, an assortment of security screw bits, torx, the assortment of standard/phillips bits and some that I had no clue as to what they were. Just an FYI if you have a bit kit also include a large rubber band with it. If you have a screw head the is trying to strip, take the rubber band and place it over the screw head and reinsert the bit and slowly twist it out. This works about 3/4 of the time.
left hand drill bits are my preference for stripped screws but often, an easy out set is the end game. I am amazed how often some one will try to reuse a screw with a damaged head. false economy in time and money. I recall that the C5a had about 15,000 pounds of screws in the wings alone. and boy howdy, most were Hy-Torque fasteners with the offset cross points. looked like a #2 Phillips but they ain't.
I agree! I have 5 different easy out sets. One them is a 25piece spiral set. Since there are so many sizes, I find themindespensible when dealing with allen head screws and bolts.There is nothing worse than trying to drill out stainless steelbolts and screws or hardened set screws.