These heavy duty hedge shears feature specially hardened center bolts for tough jobs and continued heavy use. The hollow ground, high carbon tool steel blades are mirror polished for rust and sap resistance. The blades are easily sharpened with a whet stone. 18" wooden handles are designed to withstand breaking and provide extra reach when pruning. The HSK-375 uses the same blade as the HSK-372, but with 18" handles instead of 12" handles.