The nylon shell acts as an insulator when used in electrical applications

19/64 Cobalt Heavy Duty Jobber Drill Bit

3/4-10 x 1 Hex Cap Screw SS 18-8 (A2)

3 up the shank to tightly draw the decking to the substrate

1-8 x 4 1/2 Socket Cap Screw Alloy

#28 x 6 High Speed Aircraft Bit Cobalt (6) Premium SDS Plus Hammer Drill Bits The nylon shell acts as#28 x 6 High Speed Aircraft Bit Cobalt . Manufactured to NAS 907 Type J specifications Jobber flute lengths for drilling holes in hard to reach places Heavy duty construction for portable or machine drilling For use in drilling in high tensile strength alloy steels, stainless steels, titanium and other difficult to machine materials Made in the USA