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Wera 851/4BDC BiTorsion Diamond Bit PH2 x 50mm

Product Code: 89898

Diamond BiTorsion bits literally bite into screw heads to dramatically prevent slip (cam-out). Ideal for all applications where self-drilling and self-tapping screws are driven into high resistance materials such as hard woods and ABS plastics.

  • For High-Resistance Materials
  • Diamond Coating Stops Cam-Out
  • Patented Torsion Zone Dramatically Maximises Service Life
  • Special Hardening for More Service Life
  • Forged Bits with Accurate Tip Dimensions
  • Wera's Green Band Guarantees the Best Quality
  • The Hardest Wearing Diamond Bits Available
  • For Phillips Headed Screws
  • View more information

¼" hex x 50mm.


5.0 5 2

QtyPrice per item
1 - 2 £3.79
3 + £3.22
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Wera 851/4BDC BiTorsion Diamond Bit PH2 x 50mm 5 5 2 2
Best Phillips bits you can buy I've not come across bits that grip as well on Phillips screws. As the slots are tapered, it's more difficult to prevent cam-out. They last really well too and so are good value. This may be stating the obvious, but you must not use these with Pozidrive screws or you will damage the coating. 30 Jan 2014
Worth every penny Having went through at least 4 pozi head bits renovating parts of my house from a B&D set I picked up on sale, I bought this in the Summer for the next stages. After 5 months of medium to heavy use, it's still driving screws like a dream, and pretty much never leaves my driver. 24 Dec 2012
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Brand Wera
Manufacturing Standards DIN 3126-F6.3 ISO 1173
Model Name BiTorsion
Model No 851/4 BDC PH 2 x 50 mm
Pack Size 1
Philips/Pozidriv/Torx Head Type Ph2
Product Length 50 mm
Product Thickness 6.3 mm
Product Type Diamond Screwdriver Bit
Suitable Application For Phillips Headed Screws
Suitable Use Type For High-Resistance Materials
Total Product Weight 0.01 kg