5” HSS Bi Metal Hole Saw Cutter for Wood Drywall Plastic Aluminum Mild Steel Iron Metal Stainless Steel Heavy Duty Hole Saw Bit with Arbor

Bought this to cut four holes in 1/2” plywood for a DIY air purifier I built. The holes were needed for 5” PC fans. Used them on another project to cut two holes in 1/4” luaun. Started all cuts, going 1/2 way through boards, then flipped boards to finish cuts. Nice clean cuts in all cases. Impressed with quality of saw, and expect it will be worthy of many more uses. Have not used it with metals, so cannot comment on abilities there.

I needed to install ventilation in a maritime shipping container located at a remote site to help reduce internal humidity. Decided on 6" Stainless Steel Round Vent Covers but needed a 6" metal capable hole saw to facilitate the installation. I didn't want to spend a inordinate amount of $ on a tool I would use only once. After hours of on-line research and lots of conflicting feedback I decided on this saw primarily based on two previous reviews posted by users that obviously had the knowledge and skills to utilize the tool properly. Based on these two reviews, product information and the reasonable price I took a chance. When I arrived at the work site I made my measurements and began to cut my openings using this hole saw. It was driven by a 3/8" Ryobi brush type cordless drill and a Milwaukee 3/8" brushless type drill. Both drills were variable speed and run on the low speed / high torque setting. The drills were alternated to prevent overheating and prolong the battery life. A moderate amount of Rigid Dark Cutting Oil was applied to the saw during the cutting process. Frankly, I was amazed at how well this saw worked. Driving it slowly (estimate 150 - 200 rpm) I cut a clean hole through about 3 mm (0.118") of high quality steel plate in about 15 minutes! Cutting the hole appeared to have no negative affect on the sharpness of the hole-saw and, now having a little practice, I cut the second hole in maybe 10 minutes. Amazing performance and at 1/3 the cost of some of the name brand saws. To be specific, I did use a Snap-on / Blue-Point arbor during the cutting process only because it was a known quantity that I was accustomed to using. The provided arbor and drill bit fit the hole saw accordingly, but the indexing pins appeared a bit loose. In any event, I was primarily interested in the hole-saw, the arbor and bits were a bonus and now reside in my tool box as a back-up. Bottom line: Take your time, use some cutting oil and you should have similar results. Run the saw dry at high speed and, like any other overheated cutting tool, it will fail.

The saw is good quality, the mandrel is junk and went straight into the trash. This was not a problem for me because I already have Starret and Lenox mandrels that fit perfectly. The saw made nice clean cuts out of 2" thick hardwood (oak, beech and elm). The depth is only 1.5", so this took 2 passes, front then back. I cut very slowly at 800 rpm. Blade is still sharp, like new after 13 cutouts.

I was a bit sceptical, but this 6" Diameter hole saw is heavy duty, the blades are sharp and it worked well for cutting a vent hole for a bathroom exhaust fan in my wood siding. The arbor work well. I used a channel lock pliers to snug it up to the blade, being careful to align the two pins to the holes in the blade. Screwing down the locking nut pushes the two pins into the receiver holes in the blade. I used a normal variable speed hand drill rather than my bigger 1/2" chuck drill. Either way, the cutting teeth are aggressive. You DO need to go SLOW while cutting using LIGHT pressure or you will get kick back. It's the nature of the beast. Keep the drill straight as you drill (don't wiggle it from side to side or up and down) or you will get kick back. I only needed one hole. I could have used my jigsaw, but I wanted a more perfect round hole.

Worked well to cut hole in side of house for vented oven hood

I bought this cheap 5" holesaw to cut through a 1" thick piece of steel. Not just any steel, it is 4140- a chromium molybdenum manganese alloy. But wait- not just any 4140, it is hardened 4140, 32 on the rockwell 'C' scale. A lot of 4140 is sold in the annealed state for easier cutting, but then needs to be hardened afterwards to gain the strength benefits of this alloy. I verified the 32Rc myself, cause I believe it matters for what I'm making. Anyway, this holesaw cuts it fine. I ran it at about 70 rpm, a little faster than 1 rotation per second. A little less than 100 fpm linear speed. Using a "pecking" motion, lubrication, allowing chips to clear. Many drill presses and most hand drills just won't go that slow. If you put this in a hand drill and think you're gonna cut even a piece of sheet metal, it's going to be hard to control, and if you spin it fast (like the 600 rpm speed that seems slow in your 1/2" drill) you could probably dull this in seconds. That is just the nature of a large diameter cutter like this. If you overspeed it in metal, you WILL ruin it, in seconds. This saw isn't "magic metal", and neither is one that costs 3 times as much. This was used in a milling machine..it is rigid, and can go slow. If used to cut a hole in your ceiling for a lamp, you could get away with a lot, none of this applies. The saw wasn't real round...I checked it and improved it a little by hitting with a hammer, checking, hitting, etc. BUT- more expensive brands are no better at all, they are always pretty out of round..unfortunate, but good enough. Tight quality control costs a lot. You want a $150 hole saw that's somewhat better? I'll deal with a cheap one, myself. It is a roughing tool, no more. It pains me to see most drills and holesaws oversped by users who then dull it and blame the tool!

Needed to cut through drywall and galvanized duct for an oven hood. Went through drywall like a hot knife. Nice and clean. Then the duct, which was my concern. I went slowly, added a small amount of oil a few times, and had an equally clean and pro looking cut. Very pleased. Maybe five or six minutes. Just stay slow to avoid burning the teeth. Works great, get one.

Kit includes 2 drill bits, 1 for wood & 1 for metal. Fits a 3/8 inch chuck. The box arrived in great condition but the wood drill bit was broken in 2 pieces.

So far this thing is every bit as good as my Starrett hole saws. Amazing barging for the price. My range hood needed an 8" duct so this thing easily cut through wood, siding and drywall. It's a little intimidating to use. Make sure your drill is strong enough to handle it.

Heavy piece. Use it on your best drill, a cheap drill might not be able to turn it. but worked just like it should, drilled a porthole.