I Needed to drill through 8 inches of a granite stone for a 1 inch pipe. I kept cold water on during the drilling and the bit stayed nice and cool. It took some time ( about 40-45 minutes ) I bought an adapter to use with my drill but the threads were not long enough for the bit ( the Threads don't start at the top so 1 star deduction for that ). Luckily I also have a cordless Milwaukee grinder that fit perfectly. The grinder worked great and I was able to put a lot of pressure on it too without any overheating. I went through 4 batteries ( 5ah each ). I could have used a hammer drill and star bit for MUCH faster results but it would have blown out the rock on the other side. As other have said , you need to start the hole at about a 45 degree angle and then straighten up. The bit has plenty of life left too! Great drill bit.
Ni-Mh 19.2V 3.6Ah Replacement Battery For Craftsman Diehard C3 130279005, 130279003, 315.113753, 315.115410, 315.11485 1323903 1323517 11375 11376 Cordless Power Tools
42 Review
Maximize Your Power Tools With Energup Upgraded 12V 3000MAh Lithium-Ion Battery For Milwaukee M12 - 2 Pack
52 Review
2Pack 6000MAh Li-Ion Replacement Battery For Dewalt 18V XRP Ni-Cad DC9096 DW9098 DE9503
42 Review
Energup Li-Ion Replacement Battery Pack For Black Decker Versapak VP Series With 2-Port Charger
43 Review
Sharpen Your Tools With HTS 101I0 6Pc 180Mm / 40-600 Grit Diamond Flat File Set
28 Review
Fiskars X25 Splitting Axe: 28-Inch Length for Superior Splitting Power
20 Review
RoverTac 14-In-1 Multitool Pliers With Safety Lock: Perfect For Camping, Survival, And Simple Repairs
29 Review
140Mm/150 Grit Diamond Needle File Set - 10 Piece HTS 101E0
30 Review