Laser scalpel

A laser scalpel is a Transformer surgical tool. It emits a variable laser beam that can be adjusted to cut or heat materials.

It's also great for roasting wieners.

Fiction

Marvel Comics continuity

Ratchet was fitted with a laser scalpel, which he could deploy into his palm or retract into his inner wrist. While it could be used offensively if needed, it was not powerful enough to even scratch Megatron's armor. Perhaps Decepticon surgeons start with a can opener? Warrior School! In vehicle mode, Ratchet's laser scalpel was screwed to the wall of his rear compartment. Unfortunately, the screws were not tamper-proof. Funeral for a Friend! The laser scalpel's career highlight may have occurred when it was used to take down the battle droid Guardian, with perhaps just a little help from Ratchet. The Wrath of Guardian!

Transformers: Animated continuity

In the short "Ratchet Performs Surgery on Bulkhead", one of the tools that Ratchet has Sari hand him is identified as a laser scalpel, albeit looking like the wheel-sword weapon that came with Prowl's samurai armor upgrade.

The weapon itself would actually be called by that name in the AllSpark Almanac, quite possibly meaning that Prowl uses surgical tools to fight. Funny, that.