Runser Custom Machining LLC.

Runser Custom Machining offers Hydraulic Thumb Attachment Kits for mini excavators brands including Bobcat, John Deere, Kubota, grapple buckets for Kubota, we also do custom thumb kits or claw kits with ease.

RCM kits are a great value while offering incredible quality, design and durability. We are continually striving to produce the best quality products possible.

RCM is a family owned and operated business; producing thumbs for over 10 years. Due to our designs, fabrication quality, and customer service, we have many happy customers.


Quality Comes First

Made in the USA

Family owned and operated

1-Year warranty

30-Day returns

Free Shipping

Handling Time 1 - 2 Day

Shipped UPS Ground 3 - 5 Business Days

RCM manufactures professionally designed thumb claw attachments for mini excavators in Idaho. Our thumbs are designed to fold up as close to the boom as possible under 12”. With 120 +/- degrees of rotation, for maximum use. Made in the USA, using stronger AR400 3/4'' steel that will not wear down. We also offer kits for machines with different arm lengths, optional weld on base mounts, and custom kits upon request.

Shipping to Alaska, Hawaii, Canada, and Puerto Rico available. Contact us with your address for shipping prices.

Please contact us with any questions or custom thumbs requests.


What Is in our kit

RCM Custom Designed Thumb

3/4’’ AR400 Steel Tines

Custom Hydraulic Cylinder

Professionally made in the USA

Two 1/2’’ Hydraulic Hoses

Available in different/custom lengths

Main pin

4140 Heat Treated, High Strength Steel (HSS)This HSS pin will last, decreasing chances of: complications, breaks, wear and tear.

NOT CENTER DRILLED

Hydraulic Cylinder Pins

Two pins, one single hole, one double hole, made with C-1018 steel.

Two Flat Face Quick Connect couplers

(1 Male/ 1 Female)

Two 90-degree elbows

Four Nuts and bolts

Optional cylinder mounts available

Spacers available if needed contact us

Replacement parts available

Kit may vary depending on brand and model

Please contact us with any questions or custom thumbs requests.

Kubota Backhoe L47 L48 M62 Thumb Kit

Kubota Mini Excavator Quick Connect Thumb Kit

with Kubota Three Tine Grapple Bucket.

Product Reviews

“The quality is top notch, everything fit perfect. This thumb is made better than any we have on all our equipment. : )”

— Douglas

“Quick shipping, helpful, works perfectly”

— Christopher

“I’ve ordered (4) of these kits now for different machines and they are the best bang for your buck on the market. I wish they would make them for more models and brands. They hold up well and are easy to install.”

— Harley