HERE IS A SPECIALLY DESIGNED KEY FOR OPENING AND TIGHTENING THE CLAMP ON A VIOLIN CHIN REST. IT IS MADE FROM ALUMINIUM AND THEREFORE IS VERY STRONG. THESE ARE HARD TO FIND BUT VERY USEFUL, PREVENTING POSSIBLE DAMAGE TO YOUR INSTRUMENT WHEN USING THE WRONG TOOL FOR THE JOB. ORDER BY 3PM MON-FRI AND WE AIM TO DESPATCH YOUR ORDER THE SAME DAY. ALL ORDERS OF 5 ITEMS OR MORE QUALIFY FOR FREE DELIVERY.