These are high speed bits designed for wood, aluminum or mild steel. They are not designed for brick. If you are drilling brick buy a masonry bit
Trs, I`m not sure what the tec 4 is but it seems it was a small battery drill for screws if so no they will not work. Sorry, You might ask the clerk in the tool section. He can tell you for sure.
Hello Matt sorry to say but these bits are made for a regular drill chuck, the impact bits are made with the 1/4 inch hexagon heads so they snap into the impact driver chuck. hope this helps
hello retired, me to , I have used both brands & cannot find any difference between the two unless the dewalt may drill one or two more holes than the ryobi ( I doubt it )I`m in my upper 70`s & enjoying it I hope same for you
yes and r great drill bits 4 the money remember use a light oil or a w-d 40 type lube in metal to keep yo bits sharp but Iron and brass should b drill dry and best used in low speed 4 best bore cutting in mild steel and like and cobalt bits r best 4 stainless steel.