Sealey hss drill bits fully ground 14 to 732in sealey dbi14fg this drill bit from sealey is a fully ground hss drill bit manufactured to din 338 the 135 split point is self centring which helps to reduce thrust friction and heat and aids an easier penetration efficient clog free swarf clearance making it suitable for use with both hand and pillar drills particularly on high carbon steels and copper includes a high density case for safe storage sealey dbi14fg hss drill bit 14in pa