Rebar Safety Caps
Cut rebar is very sharp so building code requires these caps.
Made of high impact plastic with a metal plate embedded in them.
Need to be OSHA compliant to guard against impalement..
Jackson Safety OSHA #3-7 from Sharpe Safety Supply
About $1.15 each with no min quantity and $11 shipping.
Some people say that when the rebar is horizontal you can get away with lower cost safety caps as there is less danger of falling on the protruding rebar. Personally I think it's best to always use OSHA compliant, but the less expensive type are available from Lowes for $10.98 for 25. http://www.lowes.com/pd_194740-80032-832029_0__?k_clickID=07c36b5d-f778-4932-9c01-d0dbb8400182&store_code=4&productId=4067486&selectedLocalStoreBeanArray=[com.lowes.commerce.storelocator.beans.LocatorStoreBean%4032683268]&storeNumber=0004&kpid=4067486&cm_mmc=SCE_PLA-_-LumberAndBuildingMaterials-_-MasonryMetals-_-4067486%3ABlue_Hawk&CAWELAID=&CAWELAID=1706954933