Any conventional electric or battery drill will do that easily with a sharp HSS drillbit.
Using a suitable 15mm wrench turn the drain plug counterclockwise.
Chefs don't usually use an "oil stone" that would be the role of the engineering and wood trades for chisels and planer blades for instance. A Chef would use "a steel". The is about 10 to 15mm in diameter and 400mm long with a handle at one end. The surface of the "steel" is similar to that of a metalworking file. The steel is held like a sword and the knife's blade drawn up the steel with the blade away from the hand holding the steel (for safety) The cutting edge making contact with the steel top end , then drawn again up the steel under the steels top end so that both cutting edges are sharpened - for an exact visual of the process look at youtube where chefs steel sharpening will give you a range of results WARNING Blades sharpened on a steel are immensely shart and can, without care cause significant injury
15mm beads is =- to how many gm?
15mm = 0.000015km
15mm (millimeters) is about 0.6 inch.
In the USA, 15mm is half-inch, and 22mm is three-quarters inch. Lengths of pipe nipples in these sizes range from one and a quarter/one and a half, to six inches, in half-inch increments.
If you mean that 15mm is the diameter, then the circumference will be 47.1mm
15mm=1.5cm. 1.5cm=0.015m So, 15mm = 0.015m
3 x 5 x m x m = 15mm
% rate = 15mm/10mm * 100% = 150%
557x299x15mm
15mm six point socket or 15mm wrench