
Emtek model btb86189us19. Back to Back Mounting supplied with: One grip with 10-32 threads in the stem; One mating grip with 3/8 in. long; Two 10-32 set screws. Standard Thru-Bolt Mounting supplied with: two thread adapters for 1/4-20 thread; two 1/4-20 flat head machine screws x 1 in.