Super Drilling Paste
No more carrying heavy cooling fluid reservoir during drilling in rails. Safetracks Super Drill Paste, SAFE 59579, is specially designed to modify the friction for the drill bit when drilling in rails.
Only a small drop on a cutting edge is enough for one hole. The tube is enough for hundreds of wells and fits easily in your pocket.
The lubricant which is a special mixture of graphite is excellent for many other purposes such as cutting, threading, screws, drilling into stainless etc.