Choosing tooling cutters abrasives comes down to more than grit: the working format has to match the task and the tool. The two industrial sanding-sheet entries are sheet-format 80-grit abrasives, the zirconia flap discs are made for stainless steel grinding with an angle grinder, and the IIT set combines a backing pad with multiple sanding-sheet grits. Listed prices run from $17.99 to $35.28, a spread of $17.29.
Quick take
Choose the 21 PIECE 4-1/2" ILLINOIS INDUSTRIAL ANGLE GRINDER SANDING DISC BACKING PAD KIT when the immediate need is a 4-1/2-inch or 5-inch grinder setup with a threaded backing pad and several grits in one set. Pick Industrial 80 Grit Zirconia Flap Discs - 10 Pack for Stainless Steel Grinding for the specifically named stainless steel grinding use case. Either entry titled industrial 2 packs of 50 Sanding Sheets Medium Grade 80 Grit 70370804 fits a shopper seeking a large quantity of medium-grade sanding sheets rather than a grinder accessory kit.
Listed-price comparison
| Abrasive or kit | Listed price | Price position |
|---|---|---|
| industrial 2 packs of 50 Sanding Sheets Medium Grade 80 Grit 70370804 | $22.50 | |
| industrial 2 packs of 50 Sanding Sheets Medium Grade 80 Grit 70370804 | $22.50 | |
| Industrial 80 Grit Zirconia Flap Discs - 10 Pack for Stainless Steel Grinding | $35.28 | |
| 21 PIECE 4-1/2" ILLINOIS INDUSTRIAL ANGLE GRINDER SANDING DISC BACKING PAD KIT | $17.99 |
The IIT kit has the lowest listed price, while the zirconia flap-disc pack has the highest. The two sanding-sheet entries sit between them at the same listed price.
Decision matrix
- Need a backing pad plus a range of sanding grits: Choose the IIT 21-piece kit. Its 5/8-11 threaded backing pad is described for 4-1/2-inch and 5-inch grinders.
- Grinding stainless steel with an angle grinder: Choose the 10-pack zirconia flap discs. They have a 7/8-inch center hole and arbor attachment system.
- Want a deep supply of medium-grade sheet abrasives: Choose either industrial two-pack-of-50 sanding-sheet entry. Each is described as a 100-item set for sanding.
- Prefer a new item: The zirconia flap discs and IIT kit are listed as new. Both industrial sanding-sheet entries are listed as open box.
Product notes
industrial 2 packs of 50 Sanding Sheets Medium Grade 80 Grit 70370804 - first entry
This entry is aimed at sanding work that calls for a substantial sheet supply: the title describes two packs of 50, and the set count is listed as 100. Its aluminum oxide sanding sheets are identified as medium-grade 80 grit, giving the selection a clear, focused abrasive format instead of a mixed-grit assortment. That makes it a sensible match when repeated work calls for the same grade of sheet. The important tradeoff is condition: it is listed as open box rather than new. It is also a sheet-abrasive purchase, not a package centered on a backing pad or flap-disc format.
industrial 2 packs of 50 Sanding Sheets Medium Grade 80 Grit 70370804 - second entry
The second industrial sanding-sheet entry carries the same title and listed price as the first, with the same 100-item set count and brown color. Choose it when the priority is a large quantity of sanding sheets for general sanding rather than an angle-grinder accessory bundle. The description also identifies a J-weighted cloth backing, adding a specific construction detail to the sheet format. Its limitation is again the open-box condition. Shoppers looking for a new abrasive item, a stainless-steel grinding disc, or several grits in one kit will be better aligned with one of the other named formats here.
Industrial 80 Grit Zirconia Flap Discs - 10 Pack for Stainless Steel Grinding
For the stated stainless steel grinding use case, this 10-pack is the most direct match. It uses coated zirconia alumina abrasive and is described for an angle grinder, with a 7/8-inch center hole and arbor attachment. The Type 29 shape is described for contours, edge blending, welds, and radius grinding, so the format suits jobs beyond flat sanding alone. Its fiberglass backing plate is another named construction feature. The limitation is focus: this is a 10-pack of 80-grit flap discs, not a multi-grit sanding-sheet kit and not a backing-pad bundle. It also carries the highest listed price in this comparison.
21 PIECE 4-1/2" ILLINOIS INDUSTRIAL ANGLE GRINDER SANDING DISC BACKING PAD KIT
The IIT kit is the clearest all-in-one starting point for compatible 4-1/2-inch and 5-inch grinders. It includes a 5/8-11 threaded backing pad that accepts hook-and-loop sanding discs, plus 20 sanding sheets. The sheet selection is divided into four each of 40, 60, 80, 120, and 180 grit, making it useful when a job moves from more aggressive sanding toward a finer finish. At $17.99, it is the lowest-priced choice shown. The tradeoff is that each included grit has only four sheets, so it is less suited than the 100-sheet industrial entries when one specific grade will be used repeatedly.
Final recommendation by use case
- For a grinder-ready assortment: choose the IIT 21-piece kit.
- For stainless steel grinding: choose the zirconia flap-disc 10-pack.
- For repeated medium-grade sheet sanding: choose either industrial two-pack-of-50 sanding-sheet entry; they share the same listed price and core details.
