Stone breaking using Dexpan type 3

How to break stones, rocks using Dexpan type 3 Depending on the weather, and the temperature of the stone/rock the expansion, usually, takes about 24 hours. Sometimes, it takes more than 48 hours to see the substantial crack. The technique that I developed for myself is the following; I usually make the first hole using a 5/8 of an inch drill bit. And then I enlarge this hole by the 3/4 inch, in the video, you can see that the first hole goes much slower than the following one. This way it's much easier for Bosch to drill a smaller hole and then to enlarge it with 3/4. Plus 5/8 inch is also much chipper than 3/4 and I while I drill holes, I change drill bits often, allowing them to cool. Materials and instruments used Set of 2 paint, mud, and cement mixer blades - https://amzn.to/3NeoEt2 BOSCH GBH2-28L 1-1/8" SDS-plus Bulldog Xtreme Max Rotary Hammer - https://amzn.to/3x2nl9P Dexpan Expansive Demolition Grout 11 Lb Type 3 - https://amzn.to/3GDvR3z Dexpan Expansive Demolition Grout 44 Lb. Type 3 - https://amzn.to/3GES01g BOSCH HC2127 3/4 In. x 18 In. SDS-plus Bulldog Rotary Hammer Bit - https://amzn.to/3NnJ1nC BOSCH HC2107 5/8 In. x 18 In. SDS-plus Bulldog Rotary Hammer Bit - https://amzn.to/3td1YSe I bought 6 drills of 5/8 inch diameter and 3 drills of 3/4 inch. And after breaking quite a few rocks, still using all of them.