The Tenyru SL-11542C is a 4-1/2-Inch 42T ATAF Silencer Blade with a 3/8-Inch Arbor. Features: * New vibration dampening system featuring TENRYU resin filled laser cut body slots. * Meticulous, hand hammer plate tensioning for a flatter blade and truer cuts. What"s In the Box: * Tenyru SL-11542C 4-1/2-Inch 42-Tooth Silencer Blade