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Items 1-10 of 669

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  1. 721-1/2P
    721-1/2P
    Greenlee Knockouts, SCSS Series
    Item Number
    721-1/2P
    MFG Item Number
    721-1/2P
    Series
    SCSS
    Product Description
    1/2in. S/B PUNCH POP PK OF 1
    Specifications
    Specifications
    Hole Diameter (in) 0.885 "
    Hole Diameter (mm) 22.5 mm
    Capacity (GA) 10 AWG
    Capacity (mm) 3.5 mm
    Operator Type Self-Centering, Split Slug
    Increase
    Decrease
    Availability
  2. DSH-3/4
    DSH-3/4
    Greenlee Knockouts
    Item Number
    DSH-3/4
    MFG Item Number
    DSH-3/4
    Product Description
    3/4in. Short Hydraulic Draw Stud
    Specifications
    Specifications
    Driver Type Hydraulic
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  3. 80053
    80053
    Icotek Knockouts, Rectangular and Square Punches Series
    Item Number
    80053
    MFG Item Number
    80053
    Series
    Rectangular and Square Punches
    Product Description
    Punch 24 rectangular
    Specifications
    Specifications
    Capacity (mm) 3 mm
    Driver Type Hydraulic
    Operator Type Rectangular
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  4. KD500B
    KD500B
    Gardner Bender Knockouts, Slug-Out Series
    Item Number
    KD500B
    MFG Item Number
    KD500B
    Series
    Slug-Out
    Product Description
    Knockout Die, 1/2in. (7/8in. Hole)
    Specifications
    Specifications
    Conduit & Pipe Size 0.5 "
    Hole Diameter (in) 0.88 "
    Hole Diameter (mm) 22.35 mm
    Driver Type Hydraulic
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  5. KP500B
    KP500B
    Gardner Bender Knockouts, Slug-Out Series
    Item Number
    KP500B
    MFG Item Number
    KP500B
    Series
    Slug-Out
    Product Description
    Knockout Punch, 1/2in. (7/8in. Hole)
    Specifications
    Specifications
    Conduit & Pipe Size 0.5 "
    Hole Diameter (in) 0.88 "
    Hole Diameter (mm) 22.35 mm
    Driver Type Hydraulic
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  6. K2BB-1/2
    K2BB-1/2
    Greenlee Knockouts
    Item Number
    K2BB-1/2
    MFG Item Number
    K2BB-1/2
    Product Description
    SLUG BUSTER 1/2
    Specifications
    Specifications
    Conduit & Pipe Size 0.5 "
    Hole Diameter (mm) 22.5 mm
    Operator Type Manual Ball Bearing
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  7. 36279
    36279
    Greenlee Knockouts, SCSS Series
    Item Number
    36279
    MFG Item Number
    36279
    Series
    SCSS
    Product Description
    DIE 1.21 (30.5) PK OF 1
    Specifications
    Specifications
    Hole Diameter (in) 1.21 "
    Hole Diameter (mm) 30.5 mm
    Capacity (GA) 14 AWG
    Capacity (mm) 2 mm
    Operator Type Self-Centering, Split Slug
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  8. 121AV
    121AV
    Greenlee Knockouts, SR Series
    Item Number
    121AV
    MFG Item Number
    121AV
    Series
    SR
    Product Description
    Punch, 0.885in. (22.5mm) 7/8in. Trade
    Specifications
    Specifications
    Hole Diameter (in) 0.885 "
    Hole Diameter (mm) 22.5 mm
    Capacity (GA) 10 AWG
    Capacity (mm) 3.5 mm
    Operator Type Standard Round
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  9. 28154
    28154
    Greenlee Knockouts, SCSS Series
    Item Number
    28154
    MFG Item Number
    28154
    Series
    SCSS
    Product Description
    SLUG-SPLITTER S/S PUNCH .88 (22.5)
    Specifications
    Specifications
    Conduit & Pipe Size 0.5 "
    Hole Diameter (in) 0.875 "
    Hole Diameter (mm) 22.5 mm
    Capacity (GA) 10 AWG
    Capacity (mm) 3.5 mm
    Operator Type Self-Centering, Split Slug
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  10. 36282
    36282
    Greenlee Knockouts, SR Series
    Item Number
    36282
    MFG Item Number
    36282
    Series
    SR
    Product Description
    PUNCH 1.21 (30.5) PK OF 1
    Specifications
    Specifications
    Hole Diameter (in) 1.21 "
    Hole Diameter (mm) 30.5 mm
    Capacity (GA) 16 AWG
    Capacity (mm) 1.5 mm
    Operator Type Standard Round
    Increase
    Decrease
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
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Knockouts

A knockout punch is a handheld tool used to punch a hole through sheet metals, plastics and other solid materials. A knockout punch consists of a punch, die and screw and can be driven by hand, a ratchet, or with hydraulics.

Knockouts all function similarly. A pilot hole is drilled into the sheet or wall to guide the punch. The die and punch are placed on the opposite sides of the sheet and the screw threaded through. As the screw tightens, the punch cuts the hole. A knockout can also be han- or ratchet-operated to simplify the process. The punch and die are simply squeezed together with one tool, without any mechanical assembly.

Knockouts are used extensively in metalworking applications and for outfitting enclosures. Holes are punched to feed cables into a sealed box or cabinet.

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