The Kearing RC45-S3 Rotary Cutter comes pre-assembled with a 45mm SKH-9 steel blade, ensuring sharp, long-lasting performance for cutting fabric, paper, leather, felt, and more. Its retractable blade with a built-in safety cover provides added protection, while the ergonomic handle offers a comfortable grip for extended use. To accommodate different materials, the blade tension can be easily adjusted by tightening or loosening the nut: Loosen for smooth cutting on thin fabrics. Tighten for controlled cutting on thick materials like carpet or leather. Now upgraded with a round-hole blade design, ensuring compatibility with future replacements. A hanging hole in the handle allows for easy storage and workspace organization.