The collars consist of a one-piece assembly with two halves joined by a triple-link hinge and fastened by a captive clamp screw. Available in 15 sizes from 3/8 to 2-in. ID, made from steel or stainless steel, they provide the same holding power as standard two-piece collars. They have a smooth bore for protecting expensive shafts and will not crush thin-wall tubing. A free sample, literature, and price quotations are available upon request.

Stafford Mfg. Corp.,
Box 2370, Woburn, MA 01888,
(800) 695-5551,