This Cardellini Head-Lock (HL) for Mitchell base heads is in EXCELLENT CONDITION and has been tested for proper operation. Cardellini Head-Lock shows scuffing & cosmetic scratch marks consistent with normal operating use (see photos). Quick release tie down securely attaches to Mitchell mount with a locking knob that smoothly rotates to expand & retract the locking jaws as intended. Head-Lock features an aligning key for quick accurate placement during installation. Simple to install on most Mitchell base heads, the Cardellini Head-Lock makes attaching your tripod head quick & easy!