“The 4.25 inch diamond core drill worked great for drilling holes for a 4 inch dryer vent through two 8 inch cement block walls. There was no other way to realistically get the job done. The SDS pilot arbor that I ordered with the core drill was not as good. The one tiny set screw was not strong enough to hold the pilot drill to the arbor. It kept coming loose. Also, because the pilot drill was so long and flexible, it was difficult to locate the hole exactly where I wanted it. Like others have suggested, I removed the pilot after the hole was started. To be honest, this 4.25 inch core drill might have been beyond the limit of my non-professional hammer drill. The drill got pretty hot. The first hole took less than 15 minutes to drill through the 8 inch block. The second hole took about three times as long, largely because my drill was overheating. But I am pleased that I got the job done. The shipment came very quickly, and I had the job done the next day. It was well worth the price for this one job alone.”
“I have two EDiamond dry core drills -- a 1.5 and a 2", with arbor and pilot drill. They are both excellent products, and if you need to drill a largish hole through cinder blocks or concrete there is simply no viable alternative than a core drill for the competent home handyman. These two did the job which I needed done just fine. Recommended. Also, good customer service follow up after I contacted them with a question.”
“Turned out I didn't need the core bit I ordered I sent it back to them and got a quick refund. The part looked to be a good quality item I will be ordering from them in the future”
“Had 4 1 1/2" holes to core drill in an 8" foundation wall. Our core drill motor was set at mid speed. Your core drill began slowing about half way though- but made it through just once. The end was worn round and little diamond was left. To complete the job we bought a more extensive core drill form another supplier. The better drill worked nicely and still has diamond. Your drill was not as advertised- Shame on you!”
“Needed to trench out some concrete cracks to seal properly and this “Crack Chaser” diamond cutter worked fast and clean. Wish I had had it years ago !!!”
“I purchased a 1- 1/8" drill that I used with a standard 3/8" electric drill. It is a bit of a challenge to start the hole if not using a guide drill. I was lucky and the first material I was drilling through was stone. It had an irregular surface so I could rest the drill against a protrusion on the stone and start the hole. Behind the stone was cement board, fire brick and then solid concrete. I drilled two 18" holes, I also purchased an extension from your firm, and didn't have any trouble. I stopped every once in awhile and pulled back on the drill to cool it and also remove some of the waste material. About half way through I removed the drill, dipped it in a bucket of water, attached the extension and proceeded. I ended up drilling an extra hole and then sealed it up just in case I need another one in the future. I have never needed one of these in 40 years of construction and don't think I will again but it worked fine. My suggestion is to perhaps start a rental program for extensions and other accessories, for guys who will only use it once. Or sent up a program to return the items purchased for a 10 or 20 percent credit. Maybe include drills, if there is a way you can determine how much "life" remains to the drill.”
