You are buying 6 saddle blocks (the black bits) for a Floyd Rose tremolo saddle.
Genuine Schaller / Floyd Rose Tremolo Arm RH or LH - Chrome, Black or Gold
Floyd Rose Tremolo Bridge Double Locking for 6 String Electric Guitar Part Black
1983 SCHALLER FLOYD ROSE TREMOLO - BLACK
Cort X-6 Electric Guitar – HSH Pickup, Floyd Rose Tremolo Gloss Black - NO CASE
Striped Series Circles White-Black Electric Guitar H Pickup Floyd Rose Tremolo
FLOYD ROSE TREMOLO ARM Whammy Bar + Socket Bush & Screw in Chrome Black or Gold
