The Bormax® WS Prima is a professional-grade Forstner bit designed for wobble-free, high-speed wood boring in handheld and stationary drills. Its durable 10 mm hex shank delivers secure torque, while the replaceable centering tip and 4 mm pilot drill ensure precise starts – even at angles or in end grain.

✨ Key Features

• Replaceable Centering Tip & Pilot Drill – Fast, accurate hole starts at any angle

• 10 mm Hex Shank – Maximum torque transfer and slip-free grip

• Offset Main Blades + Serrated Rim – Reduced feed force, friction & heat

• Rapid Material Removal – Efficient in softwoods, hardwoods, chipboard & MDF

• Low Heat Generation – Extends tool life under heavy loads

• Extended Stand Time – Maintains clean edges over many uses

• Extension Compatible – Fits FAMAG F1639 series for deep-hole drilling

⚙️ Technical Specs

(Example for Ø 25 mm bit)

• Drill Ø: 25 mm

• Cutting Length (NL): 57 mm

• Total Length (GL): 90 mm

• Shank: 10 mm hexagon

• Material: Alloyed tool steel

📐 Available Sizes

15–50 mm in 1 mm increments, covering everything from small dowels to large hinge cups.

🪵 Applications

• Cabinet hinge-cup boring

• Concealed hardware & dowel holes

• Countersinking & through-holes with extensions

• Edge-to-edge holes in plywood, laminated panels & solid wood

• Angled drilling in stair treads & end grain without tear-out

📦 Package Contents

• 1 × Bormax® WS Prima Forstner bit (blister pack)

• 1 × Replaceable centering tip Ø 4 mm

• 1 × Pilot drill Ø 4 mm

• 1 × Hex key

Click Here for replacement Centering Tips and Pilot Drills

💡 Why Choose Bormax® WS Prima?

Experience cleaner, faster cuts and longer tool life. The WS Prima’s razor-sharp geometry, serrated peripheral rim and robust hex shank outperform standard bits—ideal for joinery, cabinetry, stair construction and all precision wood-boring tasks.