BD Spurs - Heavy Duty type PAIR 12.7mm w/ BracketsSC GVS These mount onto the front side of bass drums and are used to anchor the drum and decrease sliding forward when being played. Strong yet lightweight medium duty spur set. Maximum support without adding extra weight to your drum. These spurs have pull back, spring loaded oversized rubber tip that reveal handy spike to keep your drum in place. For this pair of spurs we include two retro styled brackets.