10Pcs 1/4" 6.35mm 6mm to 4mm 3.175mm 1/8" CNC End Mill conversion sleeve,woodworking router,high Precision adapter

10Pcs 1/4" 6.35mm 6mm to 4mm 3.175mm 1/8" CNC End Mill conversion sleeve,woodworking router,high Precision adapter

Aliexpress UK