Sealey 170 Piece HSS-Co Drill Bit Set

The Sealey 170 Piece HSS-Co Drill Bit Set is a professional-grade collection of cobalt steel drill bits designed for drilling demanding materials including high carbon steel and stainless steel. These fully ground HSS cobalt drill bits are manufactured to DIN 338 standard, incorporating 5% cobalt content that significantly increases heat hardness and extends operational life when working with harder materials. The 135° split point design provides self-centring accuracy that reduces thrust during drilling and enables easier penetration into tough materials. This feature, combined with efficient clog-free swarf clearance, ensures consistent performance across demanding metalworking applications. Each drill bit is precision manufactured to deliver reliable results for professional tradespeople and engineers. This comprehensive set includes 170 drill bits ranging from 1mm to 10mm in 0.5mm increments, with multiple pieces of the most commonly used sizes. The smaller sizes (1-8mm) include 10 pieces each, whilst larger sizes (8.5-10mm) contain 5 pieces each, ensuring adequate replacements for frequently used bits. All drill bits are supplied in a tough composite storage case that keeps the set organised and protected on site or in the workshop.