Safe Levels of Fish Oil for Pets. The National Research Council has established a safe upper limit of EPA and DHA for dogs. It has yet to establish one for cats. In light of that, it is probably safe to use the guidelines for dogs for both species.
TTP Hard Drills, an easier way to drill steel and harder alloys - Cobalt Drill Sets and Cobalt Drills. Designed and developed from feedback from engineers in workshops TTP cobalt steel Hard Drills - drilling easily harder steels and metals where a normal HSS drill bit can not come close.
Larger bits tend to run about half as long due to a slightly different type of cutting action. Drilling in 1/4 glass, being twice as thick, will normally produce only half as many holes over a drill bit's life, if the glass hardness and drilling techniques are the same. Tempered glass has differing degrees of temper, and will reduce drill bit life by 75% to more than 90%, compared to standard glass.