-heavy duty -For paper,pasterboard,plastic,leather -R3 R4 R6 R10 R15 -Long level arm corner cutter SF-30 heavy duty corner cutter 1. Product Parts-Base-Handle-Blade(R3 R4 R6 R10 R15 )-#2 phillips head screw driver2. Feature-5 in 1 heavy duty-long level arm-cut papacity≤20mm3. Usageused for:paper,pasterboard,plastic,leather