Pro Grade HSS Interchangeable Pilot And Counterbore Set 21-Piece With Case, Quick-Swap Pilot Kit With 14 Bits And 6 Counterbores, 3/8 Shank Holder, Size Range 0.187 To 0.229 And 5/16 To 5/8

Interchangeable HSS pilot and counterbore set in fitted case
✔️ 14 pilots 0.187-7/16 in, 6 counterbores 5/16-5/8 in, 3/8 in holder

Compact, high-speed steel kit with 21 pieces organized in a durable aluminum case. It’s designed for precision drilling and countersinking across metalworking, woodworking, and CNC setups, and is ideal for shop benches and production lines.

✅ 14 pilots with a 5/32 in shank, sizes 0.187, 0.204, 0.213, 0.229, 1/4, 17/64, 9/32, 5/16, 21/64, 11/32, 3/8, 25/64, 13/32, 7/16
✅ 6 counterbores 5/16 in to 5/8 in for clean countersinking
✅ 1 holder with a 3/8 in shank for quick-swap use
✅ Aluminum fitted case keeps tools organized and protected
✅ HSS construction delivers durability and long tool life
✅ 21-piece kit, portable for bench, cad/cam, and machine setups

💡 What is an interchangeable pilot and counterbore kit used for in metalworking? It’s a handy kit for precise hole prep and clean countersinks in CNC and manual setups. - improves hole alignment for accurate drilling in metalwork - handy for quick pilot and countersink changes to speed up jobs - consistent countersink depths for repeatable results - works with standard 3/8 in shank holders and common machines