Bulk Packaged. Excel K1 Replacement Safety Cap. These safety caps fit: Excel K1 Handles; Excel K4 Handles; X-ACTO X3001 No 1 Knife Handle; X-ACTO X3601 No 1 Knife Handle; X-ACTO X3290 Cut-All Knife Handle; X-ACTO X3690 Cut-All Knife; X-ACTO X3623 RED Gripster Knife Handle; X-ACTO X3627 BLACK Gripster Knife Handle; X-ACTO X3626 BLUE Gripster Knife Handle; and Fiskars 9600 Razor Knife.