Using a Park HHP-2 tool to install headsets? If you don't use the Chris King Headset Installation Adapters, you'll likely put loads of force on the bearings as you press in the cups -- making your expensive, new King headset a candidate for tight spots and early ruin. These adapters save the bearings. You'll get four sets of adapters, for 1", 1-1/4", 1-1/8", and 1.5".