Ryobi Diamond Grit Coated Impact Bits: A Durability Test and Honest Verdict

Introduction

Ryobi’s diamond grit coated impact bits are the company’s newest take on a product most of us go through quickly. Impact bits take a beating, and any claim of longer life deserves a proper test. After using this set across several projects and deliberately trying to break a few of them, the short version is this: they are noticeably tougher than Ryobi’s older bits, but whether you should buy them depends on what else is on the shelf.

Putting the Bits Through Their Paces

The testing went well beyond a quick screw-in-the-stud demo. After the initial tryout, the bits were used for a large decking job and several other household tasks, driven hard the whole time. The goal was simple: see if one of them could be snapped, and none of them could. Even paired with a genuinely powerful impact driver, every bit kept working.

There is a visible sparkle in the diamond grit coating, and the bits still grip screws firmly after sustained use. That is exactly what you want from an impact bit set.

How They Held Up After Heavy Use

The bit used hardest, the one pushed through decking and repeated fastening work, still drives and grips screws without issue. Wear is visible on the tip under close inspection, but it is cosmetic more than functional. The coating has scuffed, yet the bit performs normally.

One flat bit did bend noticeably, which is worth pointing out honestly. That said, bending is a fairly normal failure mode for flat bits regardless of brand, especially when they are used as abusively as these were. Even bent, it refused to snap.

Things to Consider Before Buying

There is one oddity in the set worth knowing about before you buy. The Phillips bits, including the PH1 and PH3 and at least one PH2, appear to be coated only partway down the shaft, leaving a section of bare, uncoated metal near the tip area. By contrast, bits like the T25 are fully coated end to end. It is unclear whether this is a manufacturing quirk or an intentional design choice, but it is visible and consistent enough that you will notice it.

It is also fair to set expectations. These bits are an improvement over Ryobi’s previous generation, but they are not a revolution. Nothing about them makes them a must-buy-right-now accessory. If you already own a set of bits you trust, these will not change your workflow.

Buying Advice

If you find these at the same price as a bit set from a brand you already trust more, the more established option is probably still the safer pick. Milwaukee’s bits, for example, have been on the market longer and carry a stronger track record for durability. The Ryobi set is best viewed as a solid value option: a genuine step in the right direction from Ryobi, and a sensible purchase when it shows up at a good price rather than something to seek out at full retail.

Conclusion

Ryobi’s diamond grit coated impact bits survived every abuse test thrown at them, outlasting the older generation and holding their grip through heavy decking work. The partial coating on some Phillips bits is a strange detail, and established competitors may still offer a better overall bet at equal pricing. But at a discount, this set is a useful, durable addition to any impact driver kit.