Don't know whether these blades are suitable for 'fk5100k' oscillating saw. There are two physical interfaces for various brands of oscillating saws. The universal fit is offered by the Sonic-crafter blades and works well with my Porter Cable brand saw.

Does this fit a Rk5102k?

Yes, this will fit and work with the RK5102K. However, you may have to use the washer (spacer) that comes with it if the blade doesn't provide a tight fit on the tool.

Can rw 9122 blade replaced by the rw8981k?

I am not sure what the blade number references , but if is the same type but with the older close mounting star hole it will with an adapter that you can buy.

Have worx model wa5012 will these fit?

I believe they will with the universal fitment system

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Description

🛠️ Elevate your toolkit with blades that cut across brands and materials—because precision waits for no one.

CUT WITH CONFIDENCE - 6 high-performance blades tailored for wood, plastic, metal, and fiberglass cutting needs.
BUILT FOR REPEAT USE - Two blades of each type mean you’re always ready for your next project without downtime.
LIGHTWEIGHT DURABLE - Compact 5.3-ounce design with industrial-grade materials for long-lasting performance on every job.
PRECISION MEETS POWER - Includes precision and bi-metal blades engineered for clean, accurate cuts on soft plastics and hardened fillers.
SEAMLESS COMPATIBILITY - Universal Fit System ensures these blades work effortlessly with your existing oscillating tools, no matter the brand.

The Rockwell RW8981K Sonicrafter Oscillating Multitool End Cut Blades 6-Pack features a versatile set of blades including standard, precision, and bi-metal types. Designed with a Universal Fit System, these blades are compatible with multiple oscillating tool brands, enabling efficient cutting of wood, plastic, metal, fiberglass, and more. Ideal for professionals and DIYers who demand precision, durability, and convenience in one compact package.

Specifications

Material	Plastic
Brand	Rockwell
Product Dimensions	1.9"L x 4.3"W
Color	Black
Style	Industrial
Compatible Material	Fiberglass, Metal, Plastic, Wood
UPC	797267608567 845534011005
Global Trade Identification Number	00845534011005
Manufacturer	Positec USA
Part Number	RW8981K
Item Weight	5.3 ounces
Item model number	RW8981K
Is Discontinued By Manufacturer	No
Size	No Size
Item Package Quantity	1
Number Of Pieces	6
Included Components	Rockwell RW8981K Sonicrafter Oscillating Multitool End Cut Blades with Universal Fit System, 6-Pack
Batteries Included?	No
Batteries Required?	No
Warranty Description	Warranty

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