The CJRB Rodayo J1972 is one of the newest additions to CJRB's liner-lock flipper lineup, and it lands in a very specific slot: a full-size 3.78-inch drop point blade, G10 handles, and a ceramic ball-bearing pivot at a flat $54.99. This guide breaks down every configuration currently in stock, the published specification table, and how the Rodayo compares with the rest of the AR-RPM9 family.
The CJRB Rodayo J1972 pairs a 3.78-inch AR-RPM9 drop point blade with a ceramic ball bearing pivot.
What the CJRB Rodayo J1972 Is
The Rodayo is a manual flipper. There is no spring and no assisted opening mechanism — the blade moves on a flipper tab, one-handed, and stays put once open on a liner lock. That combination of a large flat-ground blade and a bearing pivot is what separates it from the smaller G10 flippers in the catalog.
- Model code: J1972
- Blade length: 3.78 inches (96 mm)
- Blade stock: 0.11 inches (2.7 mm)
- Blade style and grind: Drop point, flat grind
- Steel: AR-RPM9, listed at HRC 59-61
- Handle material: G10
- Lock type: Liner lock
- Pivot assembly: Ceramic ball bearing
- Weight: 4.94 oz (140 g)
- Price: $54.99 in every colorway
Rodayo J1972 Specifications
Every number below comes from the published specification table on the product listings. Nothing here is estimated.
| Specification | Rodayo J1972 |
|---|---|
| Blade length | 3.78 inches (96 mm) |
| Blade thickness | 0.11 inches (2.7 mm) |
| Blade material | AR-RPM9 |
| Blade hardness | HRC 59-61 |
| Blade style | Drop point |
| Blade grind | Flat |
| Handle material | G10 |
| Clip material | Steel |
| Pivot assembly | Ceramic ball bearing |
| Lock type | Liner lock |
| Overall length | 8.80 inches (223.50 mm) |
| Closed length | 5.02 inches (127.50 mm) |
| Weight | 4.94 oz (140 g) |
The Three Rodayo J1972 Configurations
Three SKUs are live, all at the same price, and the difference is purely cosmetic — handle color and blade finish. Two run a stone wash finish and one is coated.
| SKU | Handle | Blade finish | Price | Status |
|---|---|---|---|---|
| J1972-WBK | White G10 | Stone wash | $54.99 | In stock |
| J1972-GWH | Green G10 | Stone wash | $54.99 | In stock |
| J1972-RWH | Red G10 | Black PVD coating | $54.99 | In stock |
If you expect to cut anything abrasive — cardboard, zip ties, abrasive tape — the stone wash finish hides scratches far better than a coating, because there is no surface layer to wear through. If you prefer a low-glare blade and want the darker look, the black PVD version is the one to pick. See the AR-RPM9 collection for the rest of the steel family.
Why a 3.78-Inch Drop Point Makes Sense for Daily Carry
Blade length is the spec that gets argued about most in everyday carry, and 3.78 inches sits in a practical middle band. It is long enough to process an apple, break down a shipping box, or cut a sandwich without the blade bottoming out, and short enough that the knife still closes down to 5.02 inches and lands in a front pocket.
The drop point shape helps too. With the spine curving down to meet the edge, the tip is reinforced and centered, so it steers well through material instead of wandering. Combined with a flat grind and 0.11-inch stock, the Rodayo is set up to slice rather than wedge. For background on how blade profiles and grinds differ, see Wikipedia's overview of blade terminology.
AR-RPM9: What the Steel Actually Promises
CJRB describes AR-RPM9 as its proprietary powder steel, formulated to balance three properties that normally fight each other: edge retention, corrosion resistance, and ease of sharpening. The published hardness on the Rodayo listing is HRC 59-61.
That is the useful part for a budget-conscious buyer. A lot of inexpensive knives reach a high hardness number by trading away toughness, and they become a chore to sharpen on a normal stone. AR-RPM9 is positioned differently — the brand markets it specifically around being easy to maintain, which matters more than a two-point hardness difference for a knife that gets used daily. Hardness itself is measured on the Rockwell C scale, explained at Rockwell scale.
Liner Lock and Ceramic Ball Bearing Pivot
The Rodayo uses a liner lock: a leaf of the handle's steel liner springs in behind the blade tang when the knife opens. It is the most common locking system on folding knives for good reason — it is thin, it adds almost no weight, and it can be operated one-handed without moving your grip. Wikipedia's liner lock article covers the geometry.
The pivot is where the Rodayo earns its price. Bearings rather than plain washers mean the blade rides on rolling contact instead of sliding contact, so the flipper tab needs less pressure to get the blade moving and the knife glides shut instead of grinding. Ball bearings are also why the action stays consistent as the pivot wears in.
Rodayo vs Kestrel vs Tigris: Comparing CJRB Flippers
All three of these run AR-RPM9 at HRC 59-61, G10 handles, a ceramic ball bearing pivot, and a liner lock. What changes is blade length, blade shape, and weight.
| Model | Blade length | Blade style | Weight | Price |
|---|---|---|---|---|
| Rodayo J1972 | 3.78 in (96 mm) | Drop point | 4.94 oz (140 g) | $54.99 |
| Kestrel J1962 | 3.31 in (84 mm) | Wharncliffe | 3.74 oz (106 g) | $49.99 |
| Tigris J1919 | 3.5 in (88.8 mm) | Cleaver | 6.35 oz (180 g) | $49.99-$59.99 |
The Rodayo is the middle option by length and the lightest full-size pick of the three. The Kestrel — designed by Ray Laconico — is the compact, thin-stock choice with a wharncliffe edge that excels at controlled push cuts. The Tigris is the heavyweight: a 0.13-inch cleaver blade built for heavy cutting and flat-surface work.
Who the Rodayo J1972 Is For
- First serious EDC knife: a 3.78-inch drop point with a bearing pivot, without spending triple digits.
- Box and package duty: flat grind and thin stock make short work of cardboard.
- Multi-color matching: three handle colors at one price, so you can pair it with other gear.
- People who dislike assisted opening: the Rodayo is a pure manual flipper with nothing to break.
Skip it if you need a blade under 3 inches for tighter local carry rules, or if lightweight titanium is a priority — that is a different tier of the catalog. Compare the whole range in the full product catalog or browse liner lock knives.
Care and Sharpening Notes for AR-RPM9
AR-RPM9 is stainless, so routine care is simple: wipe the blade after food or damp work, keep the pivot clean, and touch up the edge before it goes fully dull. A 15 to 20 degree per side angle on a medium stone is a sensible starting point for a utility edge, then maintain it with light stropping passes. Science of Sharp documents how stropping actually behaves at the apex if you want to go deeper, and CJRB's own brand pages at cjrbcutlery.net list current models and specifications.
Looking for a full-size flipper with a bearing pivot? The CJRB Rodayo J1972 ships in three G10 colorways — explore the latest CJRB arrivals or the complete folding knife collection for reliable everyday carry.
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