Oscillating Tool Blade, Blade Type Long Straight , Connection Style Starlock Plus, Blade Shape Round, Blade Material High Speed Steel, Blade Diameter 3 15/16 in, Blade Width 4 in, Blade Length 4 in, Overall Length 4 in, Maximum Oscillations per Minute 19,500, Primary Material Application Wood, Materials Wood, Style Straight , Cutting Edge Style Toothed, Edge Material Bi-Metal, Compatible with Adapter Bosch, Fein