Solution mounted plane and ball bearings are available with 304 production stainless steel housing and 304 or 316 machined stainless steel housing. Poly-Round® grease-less bearings, which do not have any rolling elements or require lubrication, can be rotated 180° after wear occurs to double operational life. Value and Classic stainless steel ball bearings are setscrew-locking, while Choice stainless steel ball bearings use eccentric self-locking collar.