Starlock, 4A, Oscillating Tool Kit, Variable Speed, 8,000 To 20,000 SPM, The Starlock Interface Is A Cupped 3-D Connection That Delivers Greater Torque Transfer, No Touch Blade Change System Makes It Easy To Attach, Remove Or Reposition Blades, Includes: 3-1/2" Segment Blade, 1-1/4" Extra Clean Plunge Blade, 1-1/4"Plunge Blade, Sanding Pad, 25 Sanding Sheets, Accessory Box & Carrying Bag.