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A dolly has a frame with a pair of risers connected thereto. Connecting bolts extend partially through the risers and through the frame to connect the risers and casters to the frame. The risers have an outer riser body with a core disposed therein. The outer riser body may be a thermoplastic inject

A dolly has a frame with a pair of risers connected thereto. Connecting bolts extend partially through the risers and through the frame to connect the risers and casters to the frame. The risers have an outer riser body with a core disposed therein. The outer riser body may be a thermoplastic injection molded riser body that is molded around a riser core which may be a metal riser plate core.

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1. A dolly comprising: a dolly frame defining an upper surface, the dolly frame having a plurality of openings therethrough for receiving bolts;at least one riser having a riser body shaped in a mold around a riser plate;a plurality of bolts having a vertical axis and a length, the bolts fixed again

1. A dolly comprising: a dolly frame defining an upper surface, the dolly frame having a plurality of openings therethrough for receiving bolts;at least one riser having a riser body shaped in a mold around a riser plate;a plurality of bolts having a vertical axis and a length, the bolts fixed against rotation about the vertical axis and against movement along the length of the bolts to the riser plate of the at least one riser, wherein the bolts are at least partially encapsulated by the riser body of the at least one riser, the bolts extending from the at least one riser through the openings in the frame; andcasters connected to the dolly frame. 2. The dolly of claim 1, wherein the bolts connect the casters to the dolly frame. 3. The dolly of claim 1, the riser plate comprising a metal riser plate, the bolts being welded to the metal riser plate. 4. The dolly of claim 1, the frame comprising a generally rectangularly shaped frame, wherein a pair of the risers are attached to the frame with bolts extending therefrom. 5. The dolly of claim 1, wherein the riser body is a thermoplastic outer body. 6. The dolly of claim 1, wherein the riser body is shaped in the mold around the riser plate and a portion of the bolts. 7. A dolly comprising: a dolly frame;two risers connected to the dolly frame, the risers comprising: an outer riser body with upper and lower surfaces; andan inner core positioned between and spaced a distance from the upper and lower body surfaces;a plurality of connecting bolts having a vertical axis and a length, the connecting bolts fixed against rotation about a vertical axis and against movement along the length of the connecting bolts to the inner core and extending from the inner core through the lower surface of the outer body, wherein the connecting bolts connect the risers to the dolly frame; andcasters connected to the dolly frame. 8. The dolly of claim 7, wherein the connecting bolts connect the casters to the dolly frame. 9. The dolly of claim 7, the inner core comprising a metal riser plate, the connecting bolts being welded to the metal plate. 10. The dolly of claim 7, the frame comprising a generally rectangularly shaped frame with a pair of side members and a pair of end members connected to the side members. 11. The dolly of claim 10, wherein each of the pair of end members has one of the two risers connected thereto. 12. The dolly of claim 7, wherein the outer riser body is shaped in a mold around the inner core and a portion of each of the connecting bolts. 13. A dolly comprising: a frame having a pair of end members and a pair of side members;a pair of risers, each riser comprising: a riser body of a first material; anda riser plate of a second material different than the first material, the riser plate being positioned between upper and lower surfaces of the riser body wherein the riser body is shaped in a mold around the riser plate;a plurality of connecting bolts extending from the risers through the rectangular frame to connect the risers to the frame, wherein the connecting bolts are fixed to the riser plate and extend only partially through the riser; andcasters connected to the frame. 14. The dolly of claim 13 wherein the riser plate is a metal plate. 15. The dolly of claim 13, the riser body comprising a thermoplastic elastomer shaped in the mold around the riser plate and a portion of each of the connecting bolts. 16. The dolly of claim 15, the connecting bolts being welded to the riser plate. 17. The dolly of claim 13, wherein the connecting bolts connect the casters to the frame at corners thereof. 18. The dolly of claim 13 wherein each of the risers comprises a plastic riser body shaped in the mold around a metal riser plate, the connecting bolts extending through the metal riser plate. 19. The dolly of claim 18, wherein the connecting bolts are fixed to the metal riser plate.