As a low voltage installer I have to drill dozens of 1/8 thick I-beams to route the cable. After only making 3 holes, the 1 1/2 bit broke even on medium speed and low torque settings on my cordless drill, despite going through very thin wood. I would not recommend these bits due to poor quality.
Tool set Stels Tool set, 1/2", 1/4", CrV, plastic case 94 pcs, Stels, 94 pcs, black
45 Review
𧱠Bosch 2607017164 Piece Setter Masonry: Advanced Tools for Precision Masonry Work
20 Review
Bit and socket set BOSCH Promoline (2.607.017.322), 26 pcs.
24 Review
Bit set DeWALT DT7969-QZ, 32 pcs.
39 Review