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๐ ๏ธ Elevate your engineโs performance with the ultimate honing precision!
The Brush Research GB31212 FLEX-HONEยฎ is a 3.5-inch diameter, 120 grit silicon carbide honing tool designed for mild steel, stainless steel, cast iron, and softer ferrous materials. Its patented oversized, self-centering design ensures consistent, precise finishing and deburring in one step, producing an oil-retentive crosshatch plateau finish that enhances seal life and reduces wear. Proudly made in the USA, this tool is ideal for automotive, hydraulic, and pneumatic cylinder maintenance, compatible with various rotating spindles for versatile use.

















| ASIN | B002XUL1DK |
| Best Sellers Rank | #6,759 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Flex Hones |
| Brand | Flex-Hone |
| Brand Name | Flex-Hone |
| Bristle Type | Abrasive Globule Bonded To Flexible Nylon Filament |
| Compatible Material | Other Softer Ferrous Materials, Stainless Steel, Mild Steel, Cast Iron |
| Customer Reviews | 4.7 out of 5 stars 156 Reviews |
| Grit Material | Silicon Carbide |
| Grit Material Type | Silicon Carbide |
| Grit Number | 120 |
| Grit Type | 120 Grit |
| Included Components | GB 3-1/2" (89MM) 120SC FLEX-HONE |
| Item Diameter | 3.5 Inches |
| Item Dimensions | 13.5 x 5.1 x 5.1 inches |
| Item Weight | 0.71 Pounds |
| Manufacturer | Brush Research Manufacturing |
| Material | Silicon Carbide |
| Material Type | Silicon Carbide |
| Model | GB31212 |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Part Number | GB31212 |
| Recommended Uses For Product | Deburring, Finishing |
| UPC | 843469142832 |
| Unit Count | 1.0 Count |
| Warranty Description | Manufacturer Warranty |
B**S
Worked for Intended Purpose
Needed this to refresh some bores that were bored out oversized and had oiling consumption issues. I Ordered new rings and wanted to refresh the cross-hatch. as seen in first image of the bore, the machining marks are visible however the cross hatch isn't except for at the top where the crown sits and the rings don't ride on the cylinder walls. I used two Flex Hones to achieve the desired result, a somewhat course one & then a finer one for the finish. Hopefully the rings will Bedd themselves in nicely and have good oil retention. This is on a Toyota 2JZ 6 Cylinder Engine with an overbore of 86.5mm
T**M
good value
Just what i needed to repair a engine. Good quality at a reasonable price.
C**R
Excellent
Excellent, worked well
K**P
dingleberry
did a good job honing a vw 1.8t
C**N
Works well
Just what my husband needed for some engine rebuild work. The size is correct and the quality is good.
P**R
Quality product
Works well. Good value.
D**N
Worked Well
As described
N**.
Heavy duty stuff.
Be careful when using this. I was sent a product that was larger than what I needed (and had ordered) and I failed to notice until it was too late.
A**R
Flexi-Hone 3.5โ
Did a great job, really easy to use
Trustpilot
2 days ago
2 weeks ago