We all grew up with the X-acto brand knife and still call our cutting knives “x-acto knives.”
However, the x-acto blade of today is made of a very cheap steal that dulls and breaks very easily.
Never use X-acto! We recommend Excel of OLFA blades.

Recommend cutting knives for stencils and tape:

Excel K1 Knife with Safety Cap
Excel K2 Knife with Safety Cap

Excel K2 Knife with Safety Cap
Excel #K4 Craft Swivel Knife

Excel #K4 Craft Swivel Knife
Excel Heavy Plastic Red Handle Knife

Excel Heavy Plastic Red Handle Knife
Excel Retractable Knife with Clip

Excel Retractable Knife with Clip
Excel K18 Gripster Knife with No.11 Blade

Excel K18 Gripster Knife with No.11 Blade
Excel Light Duty Utility Knife

Excel Light Duty Utility Knife
Excel Light Duty Soft Handle Snap Blade Knife

Excel Light Duty Soft Handle Snap Blade Knife
Mask Master Frisket Cutter

Mask Master Frisket Cutter
PLAID Stencil Cutter (Stencil Burner) with 2 Tips

PLAID Stencil Cutter (Stencil Burner) with 2 Tips
OLFA® Compass Cutter

OLFA® Compass Cutter
Excel Single Edge Razor Blades - Box of 100

Excel Single Edge Razor Blades – Box of 100
Excel No. 11 Knive Steel Blade - 15 Pack Dispenser

Excel No. 11 Knive Steel Blade – 15 Pack Dispenser
Excel No. 11 Knive Steel Blade - 100 Pack

Excel No. 11 Knive Steel Blade – 100 Pack
Excel No. 11 Knife Art Blade - 5 Pack

Excel No. 11 Knife Art Blade – 5 Pack
Excel Two-notch Utility Blade - 5 Pack

Excel Two-notch Utility Blade – 5 Pack
Excel No. 2 Knife Blade - 5 Pack

Excel No. 2 Knife Blade – 5 Pack
Excel Retractable Knife Blade - 5 Pack

Excel Retractable Knife Blade – 5 Pack
Excel Swivel Knife Blade - 2 Pack

Excel Swivel Knife Blade – 2 Pack