Amazon.com : RollerWave Slide Block for Roller Skates - Easy Mounting to Quad Roller Skates for Sliding & Grinding on Rails, Coping, Curbs and More. for Outdoor Skating (Small) : Sports & Outdoors
Discoblox Standard 40mm Slide Blocks
Disco Blox Grind Blocks for Roller Skates - Lucky Skates – Lucky Skates Pty Ltd
Grind Blocks for Roller Skates
Trying Grind Blocks on my Roller Skates for the First Time ! - YouTube