Leather Hole Punch Tool Set - 6 Pcs Drill Bits 3/16" 1/4" 5/16" 3/8" 7/16" 1/2" - High-Precision Leather Punch Tool for Belts, Fabric, and Crafts - Durable Carbon Steel, Sharp and Efficient

I have never heard of punches that worked with a drill but saw these and thought they might work well on soft materials like rubber and so forth. I used the 1/4" punch on a on seal made of silicone material and it worked perfectly: Just used my 1/4" drill, applied some pressure and it made a perfect hole.All punches in the set I received are sharp.

I have only used one of them so far, but it worked great. Quite sharp and cut through my car port canvas without any issues.

Along with this set of fabric/leather hole cutter bits, I have grommet kit from General Tools with a manual (hammer-driven) punch. That punch has a sharper edge than any of the bits in this hole cutter set. I was cutting a 3/8-inch hole in two canvas bags; one with double-layer canvas, and the other with triple layer reinforced canvas. I was able to get the job done with the 3/8 inch hole cutter bit. I did learn that it is crucial to focus diligently on the bit drilling into the canvas; if you lean the bit away from the perpendicular axis (away from 90º perpendicular to your work surface), the bit will fail to cut the canvas on one side of the circle. Not a show stopper but it is crucial you maintain a perpendicular drilling posture with your drill and bit.

These bits worked well for leather and nylon.Made the job easy.

I needed to put holes in magnetic sheets, like bumper magnets. My sheets were extra thick and a standard drill bit destroyed them. Found these and hoped they worked. First, unlike everything else I've ordered lately, these arrived on time. Packing is terrible and the set is loose in a small baggie. The punches are solid steel and fairly sharp, and when put in a drill press, worked great. I put an extra layer of sheet material on a wood block to protect the bits. Again, they worked good. They tend to "swell" the hole slightly as they cut, but the hole is smooth. Time will tell about durability and They may be difficult to sharpen. So far, very pleased and really grateful they actually delivered as promised. A concept other sellers could learn from.

very cheap, 3/16' broke first usage

Why did you pick this product vs others?:Cut hole in car floor mat and it work great

I really don't see how these punches could make a clean hole without burning the material from excessive heat caused by friction. They are very blunt, no cutting edge, more rounded and flat with no real sharpness. I'm not even going to attempt to use them and possibly destroy the leather that I had intended to use them on. Not worth trying to sharpen them either.I do want to say that I think it is a good design/idea and had hopes that they would work with a good sturdy hand hex bit driver that would make the hole with some strong-arm effort and could be tapped with a hammer if needed, like a Vessel ball grip. But in order for that to be possible, they would need to be sharp as described. Maybe the set that I received missed the sharpening step and quality control inspection...