82° Countersink Bit for CNC – Bits&Bits (425-CS582)

Achieve precise, professional countersinks every time with the Bits & Bits 82° countersink bit. Crafted from solid carbide and featuring three sharp flutes, this bit provides smooth, accurate cuts with minimal tear-out. The 1/2″ cut diameter and 82° angle are ideal for most common screw heads, allowing them to sit snugly and fully contact the sides of the countersink hole. With a 1/4″ shank, this countersink bit is compatible with most CNC machines and is built to last, offering long-lasting performance and reliability. Proudly made in the USA, it delivers the quality and precision you expect from Bits & Bits.

• Same-Day Shipping: Orders placed by 2:00 PM PST, Monday–Friday, ship the same day.

• Custom Engraving Tools: Made to order and typically ship within 1–2 business days.

• Standard U.S. Shipping: Starts at $7 and delivers in 3–10 business days.

• Express Shipping: $10.99 with 2–3 business day delivery.

• Next Business Day Shipping: Starts at $35.

• International Shipping: Available via FedEx only. Rates calculated at checkout.

New, unused in-stock tools may be returned within 30 days of delivery for a full refund.
Made-to-order tools—such as custom engraving cutters—may be returned but are subject to a 25% restocking fee.

Customers are responsible for return shipping costs unless the return is due to our error (such as receiving an incorrect or defective item). After 30 days, refunds or store credit may be offered at our discretion, except for warranty-related issues. Start your return here.

Unused items may also be exchanged for other tools; shipping charges apply unless the exchange is required due to our mistake.

If your order arrives damaged, please email info@bitsbits.com