Throughout the generations, Klal Yisroel has turned to Tehillim in every time of need. Gedolei Yisroel have taught that there is kedushah in saying Tehillim from a Sefer Tehillim handwritten on klaf with kedushah.

The Steipler Gaon, Harav Yaakov Yisrael Kanievsky zt”l

Tehillim hand-written on klaf with a special kedushah, has a unique power in its tefilos. "retzuya umekubeles beyoser"
on a higher level and meriting "greater acceptance " above the Steipler wrote:
“רצויה ומקובלת ביותר”
“Especially desired and accepted.”

Harav Shmuel Kamenetzky shlita

“Tehillim from a klaf is a different Tehillim. It has kedushah like Tefillin and a Sefer Torah.”

The Satmar Rebbe, Harav Aharon Teitelbaum shlita

“I have never seen anything like this — it has tremendous kedushah.”

Harav Malkiel Kotler shlita

Based al pi Kabbalah, Tehillim from a klaf is on a high level of kedushah.

HaRav Melach Biderman
Its a big zuchas to use a Tehillim on Klaf

HaRav Dovid Goldwasser
Tehillim from a Klaf is a shmira for Klal Yisroel

These words reflect one powerful message:
Tehillim on klaf carries a special kedushah in tefillah.