The Merkur 34c HD is a classic safety razor built to last a lifetime. The 34c razor is well balanced in hand and made to last a lifetime. Review of the famous Merkur 34C Safety Razor (also known as the HD and ). It is a quality razor from. The 34C HD razor, extremely popular for its extra-thick handle, is otherwise identical to Merkurs original, internationally-revered, safety razor. The HD represents.