The easy-to-adjust integral clamp has a double-split design and relief groove that retains perpendicularity and will not mar expensive shafts. The collars are available in steel, stainless steel, and aluminum, with or without a keyway and in six standard bore sizes.

Stafford Mfg. Corp., Box 277, North Reading, MA 01864, (800) 695-5551, staffordmfg.com