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Black rectangular custom case holding 20-piece impact-rated steel bit set

BOSCH DDMSD20 20 pc. Driven Impact Screwdriving and Drilling Custom Case Set

SKU CH-WEZV-7MEJ6

20-piece impact-rated screwdriver and drill bit set in a custom case with magnetic tips and torsion zone for 50x life

  • Fit and compatibilityCombination
  • Product typeIndustrial
  • Main materialSteel
  • Sold asSet
  • Number of items12 pack
  • Key featuresCombination
  • 50x longer bit life with torsion zone design
  • Precision-milled tips reduce cam-out during driving
  • Heat-treated alloy steel for impact-rated durability
  • Laser-etched markings stay readable through heavy use
  • Magnetic tips hold screws securely on 1/4 in. hex drivers

20-Piece Impact Screwdriving Set

This 20-piece set combines impact-rated screwdriver and drill bits in a custom case for professional tradespeople and serious DIYers. The driven design delivers 50x life over standard bits with a torsion zone that absorbs torque peaks from impact drivers. Magnetic tips hold fasteners securely while laser-etched markings remain legible for the life of each bit.

Alloy Steel Construction With 1/4-Inch Hex Drive

All bits are manufactured from heat-treated alloy steel with precision-milled tips that reduce cam-out during high-torque applications. The 1/4-inch hex shank fits directly into impact drivers without adapters, and the rectangular case measures 3.5 by 10.7 by 19.4 centimeters for compact storage. The unfinished steel finish resists corrosion in demanding job-site conditions.

Upgrades From Standard Bit Collections

This set replaces mixed assortments that lack impact-rated durability or consistent 1/4-inch hex compatibility. The torsion zone and hardened surface make the jump worthwhile for users who regularly drive long screws or drill through dense materials with impact tools. Buyers needing specialised bits beyond the included combination range should supplement with dedicated sets.

How it compares

Measured against everything we stock in Workshop Hardware, Springs & Clamps, at today’s prices. Recalculated every night.

Price $30.99
Pricier than about 73% of the 383 comparable items (median $17.99).

Specifications

Product
Brand nameBOSCH
Model name20 pc. Driven Impact Screwdriving and Drilling Custom Case Set
Part numberDDMSD20
Product typeIndustrial
Size & build
Main materialSteel
Compatibility
Fit and compatibilityCombination
In the box
Number of items12 pack
Environment & compliance
Certifications and standardsYes

Questions about this item

What does the 1/4 in. hex impact-rated interface cap in practice?

The 1/4 in. hex shank fits standard impact drivers and caps at the driver's maximum torque output.

What physical space does the custom case need to fit or mount?

The case measures 3.5 L x 10.7 W x 19.4 H centimeters and weighs .335 kilograms.

How is the set installed, and what step do people get wrong?

Insert the 1/4 in. hex shank fully into the impact driver chuck until it locks; the common error is not seating the bit completely, which causes cam-out.

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