• Bit sockets are 3/8" sq. dr. with a black oxide tip, matte finish and made from SNCM 8660 steel
• For use on triple square fastener bolts typically found on European vehicles (especially German)
• For use on cylinder heads, axle shafts, rear toe adjusters, differentials, transmission drain plugs, clutches, belly pans, brake calipers and more
• Other uses include: Detroit Diesel flywheel bolts, crank pullers on 900 &4000 series engine, and headbolts on 900 series
• Bit sockets are NOT designed for use with power impact tools CAUTION: Triple square bit sockets may strip the head of double hex bit fasteners found on many Asian vehicles
