Dormer 5/16 inch x 400mm a125 HSS extra length drill bit

Extra long length drill with straight shank, diameter 0.3125" (5/16) with an overall length of 400mm and flute length of 300mm according to BS 328 standard with 118° conical point, HSS with steam tempered finish for 10xD drilling without pecking in steel

Dormer A125 HSS Extra Length Drill is a general purpose extra length drill that is ideal for long reach and deep hole applications and capable of drilling up to 10 times its diameter.