Spyder Stinger 5/16-in 4-1/8-in High-speed Steel Jobber Length Twist Drill Bit

Best drill bit out there

I don’t buy any other drill bits because the durability of these is incredible. They last so long even under constant use, I use these several times a week on cold rolled steel and they last me several months, they’re rigid, and they stay sharp for a long time.

Junk. Lasted two holes.

Trying to get through 1/4 steel and it lasted two holes before it burned up. Complete waste of money. I expected more out of Spyder.

Don't Purchase

My son need to drill out a piece of mild steel 3/4" angle iron. there was already a small pilot hole after we removed a broken rivet. this but dulled almost immediately in trying to drill to the 5/16" size. will take back for a refund.

The only thing fast is how quickly it dulls

I bought this to drill into 3/16" steel posts. It took a ton of pressure on the drill to get it to cut the first 8 holes, and each one was slower than the last. Then it simply stopped cutting at all. I switched to a Milwaukee titanium bit I thought was too ordinary for the job. It sliced through the steel in seconds with no dropoff in speed through the final six holes. The Stinger ended up being a waste of money.

There awesome

Nice bit for the price

Purchased at the last minute but only needed for drilling holes in drywall. size was perfect but I can't say how it would work on other material but was perfect for what I needed

Great drill bit

Tough cutting drill bit for heavy duty jobs . Getting more soon

It works well.

It's what I needed.