The 4-1/2 In.Type 27 Flap Disc is designed to work with Makita X-Lock Angle Grinders (XAG25, XAG26, GA4507, sold separately) and all 7/8 In. arbor grinders (sold separately) for material removal and surface preparation. The premium Zirconium abrasive grain provides consistent high cut rates, faster material removal, and longer life. Use this wheel when blending, finishing and polishing stainless steel or other non-ferrous metal. The wheel reaches up to 13,300 RPM. The Type 27 flat design is ideal for blending and finishing work on flat surfaces.