They are Bead Groove and the best money can buy. These are used valves out of a racing engine that were working fine when removed for a freshen job. Yes they have wear and it may excessive to you so do not buy unless you want them.
7 Del West 11/32" Titanium Exhaust Valves 1.625"-5.490" Bead Groove 18° SB Chevy
16 NASCAR DEL WEST TITANIUM 5/16" SUPER 7° RETAINER VALVE LOCKS KEEPERS DW-794 C
NEW Nascar Del West Titanium 5/16 Valves Locks Keepers standard 7* retainers
DEL WEST TITANIUM 5/16 Valve Locks, STD, SUPER 7, NASCAR, VALVE SPRINGS
DEL WEST TITANIUM 5/16" Shoulder Valve Locks .545 long, STD, SUPER 7, NASCAR
Del west titanium valve locks 5/16 New 16 PCS SQUARE GROOVE SUPER 7