I use Bird Clippers, they are the right size and are designed for claws with the same shape as a drgaons
(curved and round cross section)
just in case I would also get a bird "first aid kit" it will have some supplies you may need if any acidents happen.
the main thing is "styptic" it can be used to stop minor bleeding if you cut the nail to far.
look at the claws with good lighting about 1/2 the way down the claw you will see a vien that goes into the toe.
*DO NOT CUT THAT FAR*
what I do is start by one day just "nip" in a small bit of each claw. the dragon learns that you are not harming him and you get used to how to hold and postition him.
just do a few claws and then give him a break.
then a day or two later repeat and go a bit further up the claw.
this will give you time to learn how far is ok and to let the dragon be ok with the process.
also you may want to get some rough rocks or bricks that the dragon can climb to bask on.
the more he has to climb on rough rock like material he will "Naturaly" trim his nails for you.
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