# NEIKO 10628B M35 Cobalt Step Drill Bit, 7/8–1-1/8 in.

Cobalt: The NEIKO 10628B step drill bit is a single-bit option for drilling two listed hole sizes, 7/8 and 1-1/8 inches. Its 1/4-inch hex quick-change shank is intended for quick-change chucks and impact drivers, while its straight two-flute design is aimed at hole expansion and chip removal.

- [Original product page](https://best-deals.pro/product/neiko-10628b-m35-cobalt-step-drill-bit)
- [View offer](https://best-deals.pro/visit/neiko-10628b-m35-cobalt-step-drill-bit)
- Market: US
- Language: en-US
- Currency: USD
- Brand: NEIKO
- Model: 10628B
- Category: Tools & Garden > Power Tools > Drills & Drivers
- Price: 31.10 USD
- Previous price: 36.74 USD
- Discount: 15%
- Price checked: 2026-11-14T06:39:49.056Z
- Rating: 5 / 5
- Reviews: 1

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Listing describes a straight-flute step bit with two flutes and a 135-degree split-point tip.
- The 1/4-inch hex shank is described as fitting quick-change chucks and impact drivers without tightening a conventional drill chuck.
- The manufacturer lists hole sizes of 7/8 and 1-1/8 inches and says size markings are engraved on the bit.
- Cobalt construction and an AlTiSiN coating are claimed in feature text, while the details fields use different material and finish wording.

## Pros

- Quick-change hex shank is convenient for compatible chucks and impact drivers.
- Two listed hole sizes give the bit a focused use for enlarging holes in that size range.
- Straight two-flute design is described as lifting chips and deburring during drilling.

## Cons

- Only two hole sizes are specified, so this is less versatile than a multi-step bit covering a broader range.

## Specifications

### Identity
- Brand (manufacturer field): Ridgerock Tools, Inc.
- Model: 10628B
### Dimensions and installation
- Dimensions listed: 4.25 x 1.5 x 1.5 inches
- Shank type: Hex
### Materials and cutting
- Material listed: Cobalt
- Cutting diameter: 1.13 inches
- Finish type: Titanium
- Cutting angle: 135 degrees
- Flute type: Straight
- Point style: Split Point
- Number of flutes: 2
- Surface recommendation: Metal

## Before you buy

- The listing is inconsistent about construction and finish: the title and feature copy claim M35 cobalt with AlTiSiN coating, while details list Cobalt and Titanium finish. It also calls this a two-step bit with 7/8- and 1-1/8-inch sizes but separately gives a 1.13-inch cutting diameter. Confirm the selected configuration and exact size markings if those distinctions matter.

## In the box

- Step drill bit (Included)

## A good fit for

- Buyers who need the two listed hole sizes in a single step bit.
- Users with a 1/4-inch quick-change chuck or impact driver seeking faster bit swaps.
- Metalworking or DIY tasks where the listed straight-flute, two-flute design suits the material and hole size.

## Less suited to

- Buyers who need a broad range of hole diameters from one bit.
- Users whose drill setup requires a round or tri-flat shank rather than a hex shank.

## Customer feedback

There is only a single aggregate rating and no customer comment summary. That very limited rating evidence does not establish a pattern of strengths, concerns, or real-world performance for this bit.

## Frequently asked questions

### What hole sizes does the listing specify?
Feature text lists 7/8 and 1-1/8 inches. A separate detail gives a 1.13-inch cutting diameter, so check the bit's markings and selected listing if the exact maximum size is critical.
### Will it fit an impact driver?
The listing says the 1/4-inch hex shank fits a quick-change chuck or impact driver. It does not establish compatibility with every tool or drilling setup.
### What are the bit's material and coating?
Feature text claims M35 cobalt and an AlTiSiN coating, but the details fields say Cobalt and Titanium finish. The listing does not reconcile these descriptions.

## Alternative options

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## Add-ons

- [Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size](https://best-deals.pro/visit/neiko-10628b-m35-cobalt-step-drill-bit)
- [NEIKO 02638A 5-Inch Automatic Center Punch for Metal, Adjustable Impact Spring Loaded Center Punch Tool, Spring Punch, Center Punch Spring Loaded, Auto Center Punch](https://best-deals.pro/visit/neiko-10628b-m35-cobalt-step-drill-bit)

## Images

![NEIKO 10628B M35 Cobalt Step Drill Bit, 7/8–1-1/8 in. — 1](https://best-deals.pro/i/TXUxCRN0X2_Nq7THK3Q4VTZsWeYzLKqB0ZzcKgRqCw7CzDBcrV-z-3rrUFfXj12ddNAJOE2PhILnDy0JTAaV2Mqx3Crq0AadoTTAcIprF6N-SmwxkImh.jpg)

![NEIKO 10628B M35 Cobalt Step Drill Bit, 7/8–1-1/8 in. — 2](https://best-deals.pro/i/-9uVKM9DHAB_2fa0ngKFJ0nLN8PaKN7euinU6FPirUyr17CAgcnxLsvIjtaf4nPjSGsBAJaNfVXR4K3CVa61R4MIC__P35aWDLZJfjIKLqcDrrL565EH.jpg)

![NEIKO 10628B M35 Cobalt Step Drill Bit, 7/8–1-1/8 in. — 3](https://best-deals.pro/i/n5dctDWRIFLDvyc6yokUrfHKBUkmPAOkfhZVwb2kC50H2TcYFYioCH5wViEwwUHsTQAWIVeYyl_sFuM39RY_XBB8kLKq7wDEjdr4rY4h4LmlVs9MuSH2.jpg)

![NEIKO 10628B M35 Cobalt Step Drill Bit, 7/8–1-1/8 in. — 4](https://best-deals.pro/i/ACbMX351VHJCApaHjTWk0LHo0LU7yvgwq7pYz1A3H5-ZH4XXpYAdv0mo0yQO5dwDrSC8EOkmvWOETbo8RV2VIm3t6xorYFW1sPEOIaCiYlp39OffYlgW.jpg)

![NEIKO 10628B M35 Cobalt Step Drill Bit, 7/8–1-1/8 in. — 5](https://best-deals.pro/i/3Ondf89G-vthehue9q62g4jxkKYsVhr9dJt8GMcpX1Aiuzvsrq069jm8ruB3DrclKBEHiaEx_g3n_OxNUiPz7luD1RheN19BkFATRU_APSTr6zU-zIcT.jpg)

![NEIKO 10628B M35 Cobalt Step Drill Bit, 7/8–1-1/8 in. — 6](https://best-deals.pro/i/KhgObQyIl9sDTTlgVLSSqrDI1fsIiZzzVHeadhiL07cCz84qH78l7SXtbrIiN0pwqHBXfg7P2laFNEj9nJsPPcBjpDyK_FI5oW_BCItDsBXz2eieCQne.jpg)

![NEIKO 10628B M35 Cobalt Step Drill Bit, 7/8–1-1/8 in. — 7](https://best-deals.pro/i/GWUd1O-q5qQorm-tFUHgdIF4Y4Bcpe7Zkl3G1Pgxp53uX3I61aGBpBm71Cbnol1djySrBZlx6gefJx5rgmmfaya7Tk1PlK6OCr-3JHdTPp9hGTXhg282.jpg)