Designed to work with most existing floor tom leg brackets. With our floor tom to bass drum conversion kits (riser and brackets sold separately), you can convert most any three leg floor tom (with mounts capable of accepting a 10.5mm diameter rod- like our 5220, 5219, 5054 sold sep.) to a bass drum in one minute or less with no drilling or modification. Simply replace your floor tom legs with these spurs, attach the riser (sold separately), your pedal and your floor tom is now a bass drum. SIZE: fom thebend down to the floor is about 11.5 inches. These spurs ARE left and right specific.