Metal, standard 4-hole coupler.
Could match our special head.
• Noise level: ≤65dB
• Radial Runout<0.03mm
• Torque>0.15N·cm
• Clamping force: 30N-45N
• Burs size: Φ1.59~Φ1.60
C-MM-2
C-MP-4
C-MP-2