Park Tool PK-5 Professional Bicycle Tool Kit The PK-5 includes over 90 of our best shop tools selected with versatility in mind. A great way to outfit a pro bench or to set up a dream home workshop. The PK-5 is an impressive, professional set of specialty tools that can help you perform hundreds of bicycle repair and maintenance procedures. An investment you’ll use and appreciate for decades. The PK-5 enables you to do these and dozens of other bike maintenance procedures: Remove and install many common bottom brackets, cranks, and pedals Size and install brake and shifter cable and housing Diagnose and replace any multi-speed chain Replace tires, tubes and valve cores Make adjustments to derailleurs, derailleur hangers and other drivetrain components Remove and install common cassette lockrings and disc brake lockrings Correct the alignment of spoked wheels and disc brake rotors Install, remove and adjust saddles, seat posts, stems, handlebars, brake pads, etc.