Detailed Parameters of picture disck counter knife : 1. Basic size (ODxIDxT) : 118X80X8/10mm 2. Material: SKD11 3. Angle of sharpening edge: 3 degrees 4. One ring in the middle to pretect shaft from demage of screw 5. Size of step 1mm one side To get a quote or more details sooner about this bottom knife, please email us at phoebe@lcblade.com OR whatsapp +86 13399550005 Bottom Knife works with dished knife to slit rolled products like paper, film, tape, fabrics and so on into smaller width rolls. You will find the right blades here, dished knife, bottom knife, knife holder, disk knife, teeth knife, dotted knife, guillotine cutting knife, customized knife, with multiple choices of materials, available for different use. 1. Premiun material selected for different knife applications; 2. Superior precision with strict inspection to meet high requirements; 3. Excellent service life with reasonable prices; 4. Large production capability, abundant stock, available customization.