Conn-Selmer type thumb rests. Selmer, LeBlanc, Vito. With lanyard ring & pad, Conn P/N 6K1481; Standard no ring with pad Conn P/N C4311W; Universal Conn tear drop, with vertical holes & no pad, Allied A253. Standard sized screws, Allied A270, use #52 drill to install. Oversized screws, Allied A275, use #49 drill to install. Screws provided where shown.