The Norelco HQ56 is a set of replacement heads for Norelco Reflex Plus razors. The 3 stainless-steel heads in the package needed for each change on razor heads provide 45 lifters and 45 cutters to shave below skin level. HQ56 Features: Replacement Heads Stainless Steel 3 Cutters / Combs Compatible With The Following Series: 3400, 3600, 3800, 4400, 4600, 4800, 6600, 6900 Series Compatible With The Following Models: 200SC 300SX 400DX 410DB 4401LC 4601X 482XL 484XL 486XL 500RL 501RL 505RL 5426LC 5625X 5812XL 600RX 605RX 665X 700RL 800RX 825RX 705 710 715 720 725 750 805 835 850 875 885 895 900 905 915 935 945 950 955 965 968 1318 1319 1327 1327D 1328 1328E 1328S 1337C 3405 3425 3445 3604 3605 3610 3805 3810 3825 3830 3850 3860 3865 3870 4402 4403 4404 4406 4413 4414 4417 4602 4603 4604 4605 4606 4807 4816 4817 4821 4825 4845 4852 4853 4861 4865 4885 3801 5413 5426 5430 5625 5812 5813 5817 5820 5823 5824 6405 6415 6423 6445 6831 6842 6843 6844 6849 6853 6854 6855 6856 6857 6859 6861 6863 6868 6874 6879 6423LC 6424LC 6613X 6614X 6615X 6616X 6617X 6618X 6843XL 6844XL 6853XL 6856L 6863XL 6940LC HP1601 HP1602 HP1604 HP1605 HP1606 HP1608