This Bass Drum upgrade kit replaces the lousy spurs on your bass drum, using our Patented suspension mounts and gullwing style spurs. * Better Stability! Much more sturdy than the spurs on many vintage drums * Better For Transporting! Folds around bass drum to fit in cases * Better Sound! Suspension brackets allow for increased resonance! * Memory Locks for repeatable setups! ? * These install on virtually any drum, no drilling required! * US Patents 10,366,681 B2, 9,792,888 B1 The kit includes: * 2 brackets. BR2 or BR2XL replace an existing bracket on your drums, BR3 replaces an existing lug. Your choice of wingnut or key screw. * Pair of 10.5mm spurs, Your choice of 4 Sizes of Ultralight Aluminum. See below for length recommendation * 2 Memory Locks SIZING: For BR3/Lug-replacement installations, choose the size and lug count of your drum from the list below. If you are using a riser, add the height of the riser to the length of the spurs. * 16? 8-lug: 8? * 18? 8 lug: 8? * 20? 8 lug: 8? * 20? 10 Lug: 6? * 22? 8 lug: 9? * 22? 10 lug: 6? * 24? 10 lug 8? * 26? 10 lug 8? To replace Ludwig gullwing or curved spurs, choose the 1-2? bracket (BR2) and 10? Ultralight spurs. 6? spurs work great for floor-tom to bass drum conversions using the existing brackets!