Rennie Tools - Box of 10 x 4mm HSS Gold Cobalt Jobber Drill Bit Set For Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper. Twist Drill Bit Sets Supplied In A Box. 4mm Drill Bit Set

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⚡ Drill Like a Pro, Finish Like a Boss!

The Rennie Tools 4mm HSS Gold Cobalt Jobber Drill Bit Set features 10 precision-engineered bits made from high-grade M35 alloy steel with 5% cobalt, designed for tough metals including stainless steel and titanium alloys. With a 135° split point for faster, more accurate drilling and a 2-flute design for efficient chip removal, this set is ideal for professionals and serious DIYers seeking durability, precision, and versatility in one sleek gold-finished package.