One-piece shaft collars wrap around the shaft for even distribution of clamping forces. This results in a tight fit and greater holding power, without the shaft damage caused by set screws. Clamp collars are easy to remove, indefinitely adjustable, and work well on virtually any shaft. Ruland uses carefully selected materials and proprietary processes on its one-piece collars to ensure the clamping gap remains open for simpler and more precise adjustment, installation and fit. Ruland manufactures one-piece clamp shaft collars in 1215 lead-free steel with a zinc or proprietary black oxide finish, 303 and 316 stainless steel, high-strength 2024 aluminum, and engineered plastic. Bore sizes range from 1/8" to 6" and 3mm to 150mm.