Just what is a carbide burr
Carbide burrs are tools used for deburring, cutting, shaping, grinding, and chamfering hard materials. Different cuts of carbide burrs will probably be ideal for several materials.

Carbide burrs are utilized in air tools such as die grinders, pneumatic rotary tools and high-speed engravers, Micro Motors, Pendant Drills, Flexible Shafts, and hobby rotary tools.

Why use Carbide burrs over HHS(high-speed steel)?
Carbide comes with a Very high heat tolerance allowing these to operate at higher speeds than similar HSS cutters, whilst still being maintain their cutting edges. High-speed steel(HSS) burrs will quickly soften at higher temperatures while carbide Maintains hardness even under compression and it has Longer working life and it is a better choice for long term performance because of higher wear resistance.

Single-Cut vs Double-Cut
Single cut Burrs are suitable for General Purpose. It will give good material removal and smooth workpiece finishes.

Single cut is utilized with stainless-steel, hardened steel, copper, iron, and ferrous metals and may remove material quickly which has a smooth finish. Bring Deburring, cleaning, milling, material removal or creating long chips

Double cut Burrs allow for rapid stock removal in harder materials and tougher applications. The designs reduces pulling action, allowing better operator control, and reduces chips

Double cut burrs are widely-used on ferrous and non-ferrous metals, aluminium, soft steel as well as all non-metal materials such as stone, plastics, hardwood, and ceramic. This cut has more cutting edges and will remove material faster.

Double-cut leaves a smoother finish than single-cut as a result of producing smaller chips as they cut away the information. Use double-cut for medium-light stock removal, deburring, fine finishing, cleaning, smooth finishes, and creating smaller chips. Double cut carbide burrs are the hottest and benefit most applications.
For additional information about SH-2 Carbide Burrs take a look at this useful resource