It turned out that it was a steel comb.

但是后来发现其实就不过是一把铁梳子。

youdao

Textiles with a needle: equipment for linen, flax equipment, cotton spinning equipment, wool spinning equipment needle plate, curtain, steel comb configuration.

纺织用针：是为麻织设备，亚麻设备，棉纺设备，毛纺设备中的针板，帘子，钢梳配置的。

youdao

Still, I liked him most when he was back in his clothes, with his fine parting restored (he used hair oil and a steel comb), when he was great and good once more, settling me in an armchair, deftly drawing the cork from a Pinot Grigio, directing my reading.

NEWYORKER: Hand on the Shoulder