HAUTMEC 10pcs 18mm SK2H Ultra Sharp Snap Off Blades, Retractable Black Utility Knife Replacement Blades, Sharper SK2H Heavy Duty Refill Blades, Creative Safety Box, for Box, Carpet, Rope HT0144-BL

Includes 1 PACK of 10pcs L type black blades with 60 degree angle in one package; 18mm in width, 100mm in length and 0.5mm in thickness, the replacement blades are suitable for most 18mm Box Cutter Retractable Knives Designed with upgraded construction, SK2H 18mm carbon steel blade boasts better hardness, edge retention, sharpness, durability than traditional SK2 blades，helping you spend once but save more money; heat-treated hardening tech increases the hardness; black treated rust- proof material offers long-time cutting edge resistance With 8 pre-cut snap-off points, you can snap-off the blade's dull edge for a sharp brand-new tip when the tip of the blade wears out or adjust the length as you want, easy to operate and meeting long-time use