The Ruike D191 flipper knife surpasses expectations for 8Cr13MoV blade knives through advanced processing techniques. Its blade undergoes cryogenic treatment at Ruike's factory, enhancing its edge retention, corrosion resistance, and toughness. With an ideal hardness of 57-59 HRC, this high-carbon stainless steel blade is designed for superior performance. The handle of the D191 pocket knife combines two durable materials: a G10 front scale for a skid-proof grip and a stainless steel back for added reliability. Lightweight and comfortable, the handle also features a thrust roller bearing washer system that ensures smooth blade deployment. The bearing balls, crafted from high-carbon chromium steel, offer exceptional hardness, wear resistance, and durability. Affordable and well-made, the Ruike D191 flipper provides a great choice for an EDC pocketknife.