Feature :
1)hex head, size is 3/8"(9mm),head height :5mm .
2)black epdm ,combination by steel and rubber ,size 14mm
3) Fine thread , diameter has #10,#12,#14(4.8mm,5.5mm,6.3mm)
4)Length has 3/4"-5"(19mm-125mm). more than 50mm ,is part of thread .
5)Point : #2 .contractible point .#3 ,regular hot selling point ,#4 , extended point .
6) Surface : yellow /white &bule electro galvanizing . hot dip galvanizing