KwikTool USA BBS450 Bad Blade System with Patented Guard and C7 4.5-Inch Bad Blade for almost any 4.5-Inch angle grinder Bad Blade System with Patented Guard and C7 4.5'-Inch Bad Blade for almost any 4.5-Inch angle grinder Works with nearly any angle grinder, converts your own 4.5-Inch angle grinder to a -Inch Universal Cutting Machine-Inch Comes with the exclusive C7 Bad Blade, 4.5-Inch that will cut nearly anything. Great for demolition, contractors, plumbers, installers, maintenance workers, DIY, utility/telephone workers and more Easy to use with no kick-back, no need to rent specialty equipment for those hard to cut materials