McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    61 Products

    Breakaway-Blade Utility Knives

    Image of Product. Front orientation. Utility Knives. Breakaway-Blade Utility Knives, Style A.
    Image of Product. Front orientation. Utility Knives. Breakaway-Blade Utility Knives, Style B.

    Style A

    Style B

    Image of Product. Front orientation. Utility Knives. Breakaway-Blade Utility Knives, Style C.
    Image of Product. Front orientation. Utility Knives. Breakaway-Blade Utility Knives, Style D.

    Style C

    Style D

    Snap off a dull blade segment to expose a sharp edge.
    9 mm Wide Blade—9 mm wide blades are narrow for cuts in tight spaces.
    25 mm Wide Blade—25 mm wide blades are less likely than thinner blades to break while cutting through tough materials.
    Stainless Steel Blade—Stainless steel blades won’t corrode from contact with water or chemicals.
    Manual Locking—Manual-lock knives have a sliding lock to hold the blade in place.
    Automatic Locking—Automatic-locking knives lock the blade in position with the push of a button.
    Ratchet with Automatic Lock—Ratchet with automatic-lock knives have a wheel that advances or retracts the blade and locks it in place.
    Blade
    Handle
    Each
    Package
    Style
    Lg.
    Wd.
    Thk.
    Material
    No. of Segments
    per Blade
    No. of Blades
    Included
    Blade
    Replaceable
    With Blade Storage
    in Handle
    Overall
    Lg.
    Material
    Color
    Type
    Grip
    Texture
    Locking Style
    Each
    Pkg.
    Qty.
    Pkg.
    For Cardboard, Cork, Fabric, Leather, Paper, Plastic, Rubber
    A3 3/8"9 mm (0.354")0.016"Steel131YesYes5 1/2"PlasticRedStraightSmoothAutomatic35545A71000001035545A701000000
    A4 1/4"18 mm (0.709")0.02"Steel81YesNo6"PlasticYellowStraightRibbedManual3814A110000303814A10100000
    A4 1/4"18 mm (0.709")0.02"Steel83YesYes6 1/4"PlasticRedStraightSmoothAutomatic35545A7300001035545A73300000
    B3 3/8"9 mm (0.354")0.015"Stainless Steel131YesNo5 3/8"Stainless SteelGrayStraightSmoothAutomatic38155A700000638155A57100000
    C3 7/8"18 mm (0.709")0.02"Steel81YesNo5 3/4"PlasticYellowCurvedSmoothRatchet with Automatic Lock26775A6400000626775A64100000
    D5"25 mm (0.984")0.028"Steel71YesNo6 3/4"RubberYellowStraightSmoothRatchet with Automatic Lock38145A700000638145A8700000
     
    Blades

    Carton-Cutting Breakaway-Blade Utility Knives

    Image of Product. Side1 orientation. Utility Knives. Carton-Cutting Breakaway-Blade Utility Knives.
    Cut cardboard boxes without damaging the contents. This knife has a depth-cutting guide and a staple puller. Turn the wheel to advance or retract the blade and lock it in place.
    Blade
    Handle
    Each
    Package
    Lg.
    Wd.
    Thk.
    Material
    No. of Segments
    per Blade
    No. of Blades
    Included
    Blade
    Replaceable
    With Blade Storage
    in Handle
    Overall
    Lg.
    Material
    Color
    Type
    Grip
    Texture
    Locking Style
    Includes
    Each
    Pkg.
    Qty.
    Pkg.
    For Cardboard, Cork, Fabric, Leather, Paper, Plastic, Rubber
    4"18 mm (0.709")0.023"Steel81YesNo5 3/4"PlasticYellowCurvedSmoothRatchet with Automatic LockDepth-Cutting Guide, Staple Puller39585A65000000639585A651000000
     
    Blades

    Chemical Resistant Breakaway-Blade Utility Knives

    Image of Product. Side2 orientation. Utility Knives. Chemical Resistant Breakaway-Blade Utility Knives.
    The handle is chemical-resistant plastic or rubber to resist acetone and solvents.
    9 mm Wide Blade—9 mm wide blades are narrow for cuts in tight spaces.
    25 mm Wide Blade—25 mm wide blades are less likely than thinner blades to break while cutting through tough materials.
    Automatic Locking—Automatic-locking knives have a button to lock the blade in place.
    Ratchet with Automatic Lock—Ratchet with automatic-lock knives have a wheel that advances or retracts the blade and locks it in place.
    Blade
    Handle
    Each
    Package
    Lg.
    Wd.
    Thk.
    Material
    No. of Segments
    per Blade
    No. of Blades
    Included
    Blade
    Replaceable
    With Blade Storage
    in Handle
    Overall
    Lg.
    Material
    Type
    Grip
    Texture
    Locking Style
    Performance
    Each
    Pkg.
    Qty.
    Pkg.
    For Cardboard, Cork, Fabric, Leather, Paper, Plastic, Rubber
    3 3/8"9 mm (0.354")0.015"Steel131YesNo5 3/4"PlasticStraightSmoothAutomaticChemical Resistant24905A10100000624905A102000000
    4 3/8"18 mm (0.709")0.02"Steel81YesNo6 5/8"PlasticStraightSmoothAutomaticChemical Resistant24905A10300000624905A10400000
    5 1/2"25 mm (0.984")0.02"Stainless Steel71YesNo7"RubberStraightSmoothRatchet with Automatic LockChemical Resistant24905A10500000624905A106000000
     
    Blades

    Breakaway-Blade Utility Knives with Cushion Insert

    Image of Product. Front orientation. Utility Knives. Breakaway-Blade Utility Knives with Cushion Insert.
    A rubber insert provides a comfortable, slip-resistant grip. The blade is corrosion-resistant stainless steel. It locks in position with the push of a button.
    9 mm Wide Blade—Use knives with 9 mm wide blades to cut in tight spaces.
    Blade
    Handle
    Each
    Package
    Lg.
    Wd.
    Thk.
    Material
    No. of Segments
    per Blade
    No. of Blades
    Included
    Blade
    Replaceable
    With Blade Storage
    in Handle
    Overall
    Lg.
    Material
    Color
    Type
    Grip
    Texture
    Locking
    Style
    Each
    Pkg.
    Qty.
    Pkg.
    For Cardboard, Cork, Fabric, Leather, Paper, Plastic, Rubber
    3 3/8"9 mm (0.354")0.016"Stainless Steel133YesNo5 1/2"RubberYellow/BlackStraightSmoothAutomatic5098A2400000105098A241000000
    4 3/8"18 mm (0.709")0.02"Stainless Steel83YesNo6 1/2"RubberYellow/BlackStraightSmoothAutomatic5098A260000105098A26100000
     
    Blades

    Breakaway-Blade Utility Knives with Multi-Blade Loading

    Image of Product. Front orientation. Utility Knives. Breakaway-Blade Utility Knives with Multi-Blade Loading.
    Load six blades at once for quick blade changes.
    Blade
    Handle
    Each
    Package
    Lg.
    Wd.
    Thk.
    Material
    No. of Segments
    per Blade
    No. of Blades
    Included
    Blade
    Replaceable
    With Blade Storage
    in Handle
    Overall
    Lg.
    Material
    Color
    Type
    Grip
    Texture
    Locking
    Style
    Each
    Pkg.
    Qty.
    Pkg.
    For Cardboard, Cork, Fabric, Leather, Paper, Rubber
    4 1/2"18 mm (0.709")0.02"Steel83YesYes6"PlasticYellowStraightSmoothAutomatic3815A7500000063815A7510000000
     
    Blades

    Long-Reach Breakaway-Blade Utility Knives

    Image of Product. Back orientation. Utility Knives. Long-Reach Breakaway-Blade Utility Knives.
    Nearly a foot long, these knives cut in deep and hard-to-reach spaces. When the blade segment you’re using becomes dull, snap it off to expose a sharp edge. A wheel advances or retracts the blade and locks it in place.
    Blade
    Handle
    Lg.
    Wd.
    Thk.
    Material
    No. of Segments
    per Blade
    No. of Blades
    Included
    Blade
    Replaceable
    With Blade Storage
    in Handle
    Overall
    Lg.
    Material
    Color
    Type
    Grip
    Texture
    Locking Style
    Performance
    Each
    For Cardboard, Cork, Fabric, Leather, Paper, Plastic, Rubber
    4 3/8"18 mm (0.709")0.02"Stainless Steel81YesNo11"PlasticYellowCurvedSmoothRatchet with Automatic LockLong Reach7020N11000000
     
    Blades

    Precision Knives with Breakaway Blades

    Image of ProductInUse. Style A Shown with Blade Disposal Stand. Front orientation. Precision Knives. Precision Knives with Breakaway Blades, Style A.

    Style A

    Shown with

    Blade

    Disposal

    Stand

    Image of Product. Side2 orientation. Precision Knives. Precision Knives with Breakaway Blades, Style A.

    Style A

    Image of Product. Side2 orientation. Precision Knives. Precision Knives with Breakaway Blades, Style B.

    Style B

    Snap off dull blade segments to reveal a sharp edge for making precise cuts.
    Style A—Style A knives have enclosed blades to prevent accidental cuts. They also come with a stand that safely removes and stores dull blades. Insert a blade into the opening at the base of the stand and tug the knife up to break it off.
    Blade
    Handle
    Each
    Package
    Style
    Lg.
    Wd.
    Thk.
    Edge
    No. of Segments
    per Blade
    Blade
    Replaceable
    Material
    Color
    Lg.
    Wd.
    Overall
    Lg.
    Locking
    Style
    Includes
    Each
    Pkg.
    Qty.
    Pkg.
    For Use on Cardboard, Fabric, and Paper
     
    Steel Blade
    A3"3/8"0.01"Straight4YesPlasticWhite4 1/4"1/4"4 3/8"ManualBlade Disposal Stand24585A101000000624585A102000000
     
    For Use on Cardboard, Cork, Fabric, Leather, Paper, Plastic, and Rubber
     
    Steel Blade
    B3 1/8"3/8"0.015"Straight7YesStainless Steel
    5 1/4"7/16"5 3/8"Manual24585A50000624585A5100000
     
    Replacement Blades
    back to top