Terms of Service

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Happy Jack's Terms of Service

Happy Jack sells internal concrete vibrator heads, shafts, power units, accessories, & parts from Northrock Industries Inc. Parts from Northrock Industries are made to be replacements for Master, Mikasa, Oztec, Stone, Stow, Viber, Wacker & Wyco products.

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Get In Touch

We are located in Doylestown, PA.

Email: [email protected]
Phone: 1-800-886-4277

Parts By Vendor

Master^Ⓡ
Mikasa^Ⓡ
Northrock^Ⓡ
Oztec^Ⓡ
Stone^Ⓡ
Stow^Ⓡ
Viber^Ⓡ
Wacker^Ⓡ
Wyco^Ⓡ

Master^Ⓡ
Mikasa^Ⓡ
Northrock^Ⓡ
Oztec^Ⓡ
Stone^Ⓡ
Stow^Ⓡ
Viber^Ⓡ
Wacker^Ⓡ
Wyco^Ⓡ

Vibrator Parts

Accessories

Accessories

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*** Announcement: Jack has officially retired. Ownership transition coming soon. ***