Jobber Drill Bit, Drill Bit Size 13.30 mm, Drill Bit Point Angle 140 Degrees , Carbide, Decimal Equivalent 0.5236, Metric, Drill Bit Point Type R Thinning Point, Non-Coolant Through.
19-1974: Method for the Measurement of Real-Ear Protection of Hearing Protectors and Physical Attenuation of Earmuffs. These noise cancelling earmuffs seamlessly integrate into Skullerz Hard Hat and Safety Helmet dedicated side accessory mounting slots for a secure fit..These mounted earmuffs are tested to ANSI S3.