The Multi-Trowel: The world's only radius adjustable trowel. by Alex Cloutier — Kickstarter
Radius Garden 13 in. Root Slayer Carbon Steel Hand Trowel, 6 in. Handle 16011-21 - The Home Depot
Amazon.com : Multi-Trowel Radius Adjustable Trowel by InnovaTools | Rounded Corners, 16" (405mm) : Tools & Home Improvement
CSR Building Supplies Ltd. - The Adjustable Radius Mutil-Trowel Now available at CSR! Choose from three different sizes and three different blade shapes. Also available with or without protective trowel wallets. - -
Multitrowel - ACME Equipment Pte Ltd
Amazon.com : Multi-Trowel Radius Adjustable Trowel by InnovaTools | Rounded Corners, 14" (355mm) : Tools & Home Improvement
Warner Manufacturing Tool 214 Adjustable Inside Corner Trowel - Amazon.com
Adjustable Plastering & Drywall Radius Trowel for Curved Surfaces | eBay