Klein Tools Tamperproof Security Bit Set 33510S 23 Piece (1/4 Inch Hex Shank S2 Steel ProFlex Torsion Magnetic Holder Pocket MODbox Case Kit)

Klein Tools 33510S 23-Piece Slim ProFlex S2 Steel Tamperproof Security Bit Set

The Klein Tools 33510S 23-Piece Slim ProFlex Tamperproof Security Bit Set functions as a specialized impact-rated driver bit kit engineered to install and service pin-in-head security fasteners across commercial HVAC units, electrical control panels, and public infrastructure. Housed inside a pocket-sized MODbox-compatible slim storage case measuring 5 inches long by 3-1/8 inches wide by 1 inch high and weighing 7-4/5 oz, this compact set contains 22 tamper-resistant pin bits forged from impact-rated S2 alloy steel with ProFlex stress-absorbing torsion zones and a stainless steel magnetic bit extension holder. Designed to withstand severe rotational torque spikes from power impact tools, this high-density kit allows commercial technicians, electricians, and facility maintenance contractors to engage pin-in TORX, pin-in hex, and spanner fasteners without fracturing bit tips or stripping head pins.

Best Used For:

• Commercial Security Enclosure Servicing: Removing tamper-resistant pin-in TORX and pin-in hex screws on public restroom fixtures, security alarm panels, and commercial HVAC access doors.
• High-Torque Power Driving: Fastening specialized pin-in security screws with 1/4 inch power impact drivers without snapping bit tips under sudden torque spikes.
• Portable Pocket Storage: Transporting a full 23-piece security bit driver collection inside compact tool pouches, work aprons, or stacked Klein MODbox storage systems.

Key Performance & Safety Features

• ProFlex Energy-Absorbing Torsion Zone: Optimized S2 steel bit shank geometry flexes under peak rotational torque loads to reduce stress concentration and prolong bit life.
• Impact-Rated S2 Alloy Steel: Heat-treated steel construction absorbs shock impacts from cordless power drivers when driving heavy security hardware.
• Stainless Steel Magnetic Bit Extension: Internal high-strength permanent magnet retains 1/4 inch hex security bits and prevents fastener drop-off during overhead work.
• Secure-Pivot Internal Bit Slots: Swiveling bit storage rails hold bits tightly inside the case to prevent loose pieces from falling out during transit.
• MODbox Compatible Pocket Case: Ultra-slim hard-shell case fits into standard pants pockets or interlocks directly onto Klein MODbox modular storage bins.

What's Included

• (9) Tamperproof Security TORX® Bits (T8H, T9H, T10H, T15H, T20H, T25H, T27H, T30H, T40H)
• (11) Tamperproof Security Hex Bits (TR 3 mm, TR 4 mm, TR 5 mm, TR 6 mm, TR 7 mm, TR 8 mm, TR 3/32 inch, TR 1/8 inch, TR 9/64 inch, TR 5/32 inch, TR 1/4 inch, TR 5/16 inch)
• (2) Spanner Bits (#8, #10)
• (1) Stainless Steel Magnetic Bit Holder Extension
• (1) MODbox™ Compatible Ultra-Slim Pocket Storage Case

Technical Specifications

Pro-Tip: When removing stubborn or rusted pin-in tamperproof security screws on outdoor enclosures, push the impact driver firmly along the center line of the screw head before engaging power. Keeping steady axial pressure prevents the tiny center pin clearance hole on the bit from binding against the pin and shearing the driver face.