​ ​Material: Carbide Grit ​ ​Size: 88mm (3-1/2inch) ​ ​Colour: Gold ​ ​1. Made of High Carbon Steel and Carbide Grit. Using high-temperature quenching to enhance durability. ​2.Our semi circle carbide oscillating blades are professionally used for grit grout mortar concrete masonry. ​3. The oscillating carbide blade can enter a narrow space, which can realize the installation of electronic equipment and sanding of cement joints. ​4.Fits almost conventional machines & Some exceptions: Black & Decker / Porter-Cable / Craftsman / Rockwell / Mastercraft / Skil / Fein / Einhell / Worx / Demel (Non Quick Lock), Bosch (Non Quick Lock), Milwaukee / AEG / Chicago / Makita / Ryobi etc----"Does NOT MAY fit Dremel MM40, MM45, Bosch MX30, Rockwell Bolt On and Fein SuperCut''.