The blade is designed for knife – oscillate work and supports material thicknesses up to 17.2 mm with a 63 degrees + 84 degrees cut angle and a 0.63 mm blade thickness. The flat stock profile gives the blade a familiar handling style for operators who already work with comparable tools.

In day-to-day production, CS-K21 is especially relevant for board – soft such as Corrugated Plastic, Dispa(R), F-Sorb(R), Foam Board and Fome-Cor(R), corrugated double wall such as A/B Flute, B/C Flute, B/E Flute, E/B Flute and E/C Flute, corrugated single such as A Flute, B Flute and C Flute, corrugated triple wall such as E/B/E Flute and flexible material such as Carpet, Cork, Ejection Rubber, Fiber Glass and Foam. These material matches make it useful for operators who need one blade option that can be selected confidently for common production boards, films, textiles, composites, packaging stock or flexible sheet materials shown in the product data.

The listed overcut values a 1.6 + 0.11 mm end overcut, which helps operators compare this blade against nearby alternatives when fine tuning corners, lead-ins and small details.

CS-K21 is also listed with compatible or alternative reference terms including 3910314, 421, 42458257, 895021, 9004, BLD-SF421, Colex T00421, CWTE21, CWX-E21, CWXE21, E21, G42458257, i-421 and i421. These references are helpful when replacing an existing blade, comparing supplier part numbers, or confirming that the product matches the naming used in older job sheets and machine setups.