Reliance’s 558 Stool Provides Optimal Stability During Delicate Procedures Features Designed for optimal stability during the most delicate surgery A specially designed floor lock prevents chair movement during surgical procedures Foot lever allows stool adjustment without breaking the sterile field Large adjustable backrest Angle of the arms adjusts along the horizontal axis, then rotates to rear at the completion of the procedure The 558 is a specialty stool offering standard heights from Low: 21″ to 28½” Medium: 24″ to 31½”. High: 27″ to 34″ Available in a variety of upholstery colors Made in U.S.A.