Professional Drywall & Plastering Razor Knife - 12 Pack Bulk Display | Heavy Duty Utility Knife for Construction, Home Renovation & DIY Projects | Perfect for Cutting Drywall, Plasterboard & Wallpaper

I'm a professional wallpaper installer and was hoping this item would be useful in my business. Although the design is great within a few hours of changing blades on my first job using this blade holder the metal slide became loose and failed to continue to hold blades securely for cutting. Not professional grade quality, especially for the $8.60 I paid.