for large or small stony corals, wet tile saws work great to cut wafers to glue to plugs. I suggest always wearing gloves when fragging, many make stuff you may react to , particularly soft corals (sharp knife works best on them). Also rinse your coral/soak in a small bucket of salt water, as many will get mucusy (?sp) from the stress, and this allows you to put a calmer frag back in your tank without stressing your other inhabitants.