Precise dimensions for various needs Roller diameter: 1 1/2 in (38 mm) Shaft diameter: 1/2 in (12 mm) Roller surface length: 3.9 in (100 mm) to 39.4 in (1000 mm) Total length: 5.5 in (140 mm) to 40.9 in (1040 mm) Load rating: 15–65 kg (33–143 lb) Durable 304 stainless steel construction Rollers are made from 304 stainless steel with iron center shafts Provides smooth, flat surfaces for stable, reliable movement Quiet operation with minimal vibration Simple spring pressin installation Install the nonspring end first Then press the spring end into place on the bracket Typical installation time is under 10 minutes Wide range of applications Woodworking roller holders and material holder rollers Marine rollers and dock rollers Conveyor replacement rollers Suitable for miter saw infeed/outfeed and DIY woodworking projects Use scenarios In a woodworking , use as miter saw infeed/outfeed rollers to support and guide long boards for improved accuracy and reduced drift On a boat or dock, use as marine or dock rollers to guide and protect lines or materials, or as part of docking equipment In a small workshop conveyor setup, use as replacement rollers to enable smooth part transport with minimal maintenance