Drill America vs TTP Hard Drill Bits- Drilling Hard Metal.

Independent Drill Bit Review by DIYMark

Independent tests are one of the best ways to prove performance. In this video, DIYMark, a popular YouTube product tester, pits TTP HARD cobalt drill bits against his long-time favourite, Drill America. The challenge? Drilling through tough, hardened steels.

Mark openly admits he expected Drill America to win — but was surprised when the TTP HARD bit not only matched but outperformed his usual choice. This unbiased test highlights the cutting efficiency, durability, and reliability of TTP HARD cobalt drill bits on hard metals.

Key Highlights from the Video

• Independent test by DIYMark (not sponsored by TTP HARD)

• Drill America vs TTP HARD cobalt drill bits in tough steels

• TTP HARD shows superior cutting and durability

• Reviewer openly surprised by the outcome

• Proof of performance from a trusted 3rd-party source

Product comparison tests are highly valued by buyers, as they provide unbiased insights into performance. In this independent demo, DIYMark — known for his no-nonsense tool reviews — compares his trusted Drill America bits against TTP HARD cobalt drill bits.

The test materials are hardened steels, the kind that punish standard HSS bits. Mark’s commentary is candid: he expected Drill America to dominate. Instead, the TTP HARD cobalt bit cut cleaner, stayed cooler, and ultimately delivered a better result.

This kind of independent feedback demonstrates that TTP HARD drill bits aren’t just strong in theory — they outperform big-name brands in practice. For professionals and serious DIYers, this proves the value of investing in quality cobalt bits when drilling stainless steel, hardened bolts, HARDOX plates, and other extreme metals.