Files handles a must!!! Glad you are thinking about them. I've got a little story to tell.....
way back when I was in my early 20's I worked part time at a mold shop doing rough milling and grinding and other machinist work. Well I started at 4:00 p.m. and some of the guys from days would leave at 5:00 p.m.. So this day I come in and there is bunch of blood all over the floor and one the chuck/bed of lathes. I come to find out that one of the moldmakers was using the lather and he cut off a part and then usd a file without a handle to break the edge of the piece in the chuck and when he got a little to close to the chuck with the end of the file, it pushed the tang into the base of his palm and into his wrist.
So the guy returns to work 8 weeks later wearing a glove on his injured hand, this time he is drilling a 2" diameter hole into a 4" thick steel plate on a Ooya radial drill. Sure enough the bit has two huge three foot long chips whipping around and he reaches over to break them off. Not a good idea, the chip grabbed his glove and that then pulled his thumb off, including the tendon from completely up his arm!! I'm in the back of the shop and I hear screaming and run up to see him standing there with his thumb and tendon spinning around on the 2" bit. The shop foreman hit the stop button and they called the ambulance. He ended up loosing his thumb, he ended up retiring after that, which is a good thing because at the rate he was going he was going to end up dead.
So the lesson learned from this story is, - use a handle on the file.
TheGrooveking