8mm diameter, 57.5mm overall length, 27mm max hole depth, left hand rotation, 10mm shank. * The 57.5mm long bits have a 10mm x 20mm shank making them compatible with most boring machines. * Drills all composition materials, solid surface materials, plywoods, hardwoods, and softwoods. * Use on automatic and manual muti-spindle boring machines * Freud"s Limited Lifetime Guarantee