You need a pin spanner for the non-drive side (adjustable) cup although a pair of needle nose pliers or a small punch and hammer in the pin-holes can be used to remove it. Threading is standard right hand. The drive side (fixed) fixed cup requires a specific wrench or you can improvise by clamping the flats in a bench vise and using the frame as the lever. Keep in mind the fixed cup can be VERY tight and is LEFT HAND threaded.