Redi-lock is a unique easy change system and mainly used on Husqvarna and Scanmaskin floor grinders. It's very convenient when installing a redi lock grinding disc. What you need is just a hammer, for beating the disc into the slot. Both Husqvarna and Scanmakin grinders adopt a redi-lock quick-change system, but the size of the redi lock is different. The scanmaskin redi lock is longer and narrower. Please check the difference as follows: The scanmaskin grinding disc on this page is equipped 2 big hexagonal diamond segments (15mm height), which lengthens its lifespan. Sunny Superhard Tools prepares different great bonds for different hardness of concrete, including extremely soft bond(for grinding extremely hard concrete). A wide range of diamond grits can do coarse grinding, medium grinding, and fine grinding. Optional packagings give you more choice. Redi lock design for Scanmaskin floor grinders. 2 big 15mm height hexagonal diamond segments ensure its long lifespan. Different great bonds fit different hardness of concrete. High productivity & save your cost. Optional Specifications Optional Diamond Grit 6#, 16#, 36#, 60#, 80#, 120#, 180#, 220# Optional Metal Bond extremely soft, very soft, soft, medium soft, hard, and very hard Optional Packaging 6 or 9 pieces per box Optional Painting Color High light or Matt, common colors are: orange, yellow, red, black, purple and blue Other services OEM/ODM service is available, such as logo engraving(free), painting color(free), and etc. SYF-D08S