Same here. I've never broken one myself but that doesn't mean no one I've ridden with hasn't. I've made three field repairs on other rider's bikes over the years. I carry a Ritchey CT-5, a very tiny 25 gm chaintool that uses a 5 mm hex wrench to turn the screw press. It's certainly not a shop tool but fine for emergencies. I also carry Shimano replacement pins and/or a used Wippermann Connex link.