The Klein Tools 33801S 12-piece screwdriver bit set is displayed in an open, orange MODbox compatible storage case, featuring eleven impact-rated S2 steel bits and one magnetic bit holder organized in secure-pivot slots for easy access.
An essential bit selection graphic illustrating the contents of the 12-piece Klein Tools set, including 3/16-inch and 1/4-inch hex, #1 and #2 Phillips, #1 and #2 square, T15, T20, and T25 TORX, and 1/4-inch and 3/16-inch slotted bits alongside a magnetic bit holder.
Close-up action shot of a Klein Tools impact-rated bit being used in a cordless impact driver, emphasizing its high-torque capability for demanding professional screwdriving applications.
A perspective shot of the ultra-slim Klein Tools bit case with its clear lid partially open, highlighting the compact 5-inch by 3-inch dimensions and the MODbox modular storage system compatibility.
Technical illustration of the Klein ProFlex torsion zone on a #2 Phillips bit, showing how the specialized design reduces stress and absorbs torque to extend bit life and improve impact performance.
Detailed view of the open Klein Tools storage case with the bits angled in the easy-access storage tray, also showing a side compartment used for storing loose fasteners like screws and washers.
A demonstration of the modular connectivity of the Klein 33801S case, showing how the back latch securely connects to larger MODbox storage cases for organized jobsite tool management.
A size comparison image showing the 5-inch by 3-inch pocket-sized Klein bit case next to a modern smartphone, illustrating its portable design that fits easily into tool pouches or pockets.
An open view of the Klein Tools 12-piece impact-rated bit set in its orange MODbox case, showcasing the eleven precision-machined S2 steel bits and the magnetic bit holder in their secure-pivot storage slots.
Klein Tools USA promotional video
The Klein Tools 33801S 12-piece screwdriver bit set is displayed in an open, orange MODbox compatible storage case, featuring eleven impact-rated S2 steel bits and one magnetic bit holder organized in secure-pivot slots for easy access.
An essential bit selection graphic illustrating the contents of the 12-piece Klein Tools set, including 3/16-inch and 1/4-inch hex, #1 and #2 Phillips, #1 and #2 square, T15, T20, and T25 TORX, and 1/4-inch and 3/16-inch slotted bits alongside a magnetic bit holder.
Close-up action shot of a Klein Tools impact-rated bit being used in a cordless impact driver, emphasizing its high-torque capability for demanding professional screwdriving applications.
A perspective shot of the ultra-slim Klein Tools bit case with its clear lid partially open, highlighting the compact 5-inch by 3-inch dimensions and the MODbox modular storage system compatibility.
Technical illustration of the Klein ProFlex torsion zone on a #2 Phillips bit, showing how the specialized design reduces stress and absorbs torque to extend bit life and improve impact performance.
Detailed view of the open Klein Tools storage case with the bits angled in the easy-access storage tray, also showing a side compartment used for storing loose fasteners like screws and washers.
A demonstration of the modular connectivity of the Klein 33801S case, showing how the back latch securely connects to larger MODbox storage cases for organized jobsite tool management.
A size comparison image showing the 5-inch by 3-inch pocket-sized Klein bit case next to a modern smartphone, illustrating its portable design that fits easily into tool pouches or pockets.
An open view of the Klein Tools 12-piece impact-rated bit set in its orange MODbox case, showcasing the eleven precision-machined S2 steel bits and the magnetic bit holder in their secure-pivot storage slots.
Klein Tools USA promotional video
KLEIN TOOLS

Klein Tools Screwdriver Bit Set 33801S 12 Piece Slim ProFlex Impact Rated S2 Steel (Phillips Slotted Square TORX MODbox Compatible Storage Case)

In stock
SKU: 33801S
$9.99 USD

Description

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Klein Tools 33801S 12 Piece Slim ProFlex Impact-Rated Screwdriver Bit Set

The Klein Tools 33801S 12-Piece Slim ProFlex Bit Set functions as a high-torque impact driving accessory kit engineered to drive threaded fasteners without cam-out or tip breakage. Forged from premium S2 tool steel with a Titanium Nitride finish, each bit features an engineered ProFlex torsion zone that absorbs high peak torque loads from 1/4 in. impact drivers. Housed in a 6-10/11 oz. ultra-slim MODbox compatible storage case measuring 5 in. L x 3-3/25 in. W x 1 in. H, this 12-piece set includes eleven 2 in. driver bits and one heavy-duty magnetic bit holder, enabling electricians, HVAC technicians, and commercial contractors to secure fasteners into metal stud framing, electrical enclosures, and junction boxes.

Best Used For:

  • Electrical Panel & Enclosure Assembly: Driving Phillips, slotted, and square fasteners into steel junction boxes, conduit straps, and breaker panels.
  • HVAC Ductwork & Equipment Fastening: Driving TORX and hex head screws into heavy-gauge sheet metal ducting and rooftop unit housings.
  • Modular Jobsite Tool Organization: Snapping the ultra-slim 4/5 in. deep storage case directly into Klein MODbox toolboxes and pouch rails for rapid bit access.

Key Performance & Safety Features

  • ProFlex Peak Torque Torsion Zone: Specialized neck geometry flexes under rotational load spikes to prevent bit tip shear and extend service life.
  • Premium S2 Steel & Titanium Nitride Finish: Industrial S2 alloy steel construction resists tip wear and deformation during high-repetition impact driving.
  • MODbox Compatible Slim Case: Compact case profile snaps directly into Klein MODbox modular storage components and fits inside standard tool pouches.
  • Secure-Pivot Bit Retention Trays: Swiveling bit storage rails hold driver bits firmly in place to prevent accidental spillages when the case is opened.
  • High-Strength Magnetic Bit Extension: Concentrates magnetic force through inserted drive bits to hold steel screws firmly on center during one-handed starting.
  • Comprehensive Multi-Drive Selection: Features most-used Phillips, slotted, TORX, square, and hex drive profiles for commercial jobsite requirements.

What's Included

  • (1) #1 Phillips Impact Driver Bit
  • (1) #2 Phillips Impact Driver Bit
  • (1) 3/16 in. Slotted Impact Driver Bit
  • (1) 1/4 in. Slotted Impact Driver Bit
  • (1) T15 TORX® Impact Driver Bit
  • (1) T20 TORX® Impact Driver Bit
  • (1) T25 TORX® Impact Driver Bit
  • (1) #1 Square Impact Driver Bit
  • (1) #2 Square Impact Driver Bit
  • (1) 3/16 in. Hex Impact Driver Bit
  • (1) 1/4 in. Hex Impact Driver Bit
  • (1) High-Grade Magnetic Bit Holder
  • (1) Slim MODbox Compatible Storage Case

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 33801S
Tool Classification Type 12-Piece Impact-Rated Screwdriver Bit Set
Primary Core Metallurgy Forged S2 Tool Steel
Surface Protection Coating Titanium Nitride Corrosion Shield
Fastener Holding Mechanism Magnetic (via Included Magnetic Bit Holder)
Drive Shank Compatibility 1/4 in. Quick-Change Hex Shank
Case Overall Length 5 in.
Case Overall Width 3-3/25 in. (3.12 in.)
Case Overall Height 1 in. (1.02 in.)
Case Depth Clearance 4/5 in. (0.81 in.)
Modular Storage Compatibility Klein MODbox System Integrated Mounts
Assembled Net Kit Weight 6-10/11 oz. (6.1 oz. / 0.38 lbs.)
Global Trade Item Number GTIN 00092644331916

Pro-Tip: When driving self-tapping screws into thick steel electrical boxes with the Klein 33801S bits, ensure the bit shank is fully seated into the included magnetic bit holder. Using the magnetic extension centers the driving force directly through the ProFlex torsion zone, preventing tip wobble and reducing cam-out wear on screw heads.