The Perfect Cartridge Grip: Years of Refinement, Unmatched Performance. It took time, but we've achieved perfection. These cartridge grips, meticulously crafted with the ideal weight and balance, transform your lining experience, making it feel like drawing with a sharpie. Packing and shading become effortless, thanks to the precision design. Autoclavable and reusable, these grips are built to last and come with three stroke rods for universal compatibility. Invest in quality, invest in your craft.