description 10 ft.-17 ft. aluminum extension plank the werner® 10-foot to 17-foot aluminum extension plank works with a variety of straight extension ladders, single straight ladders, extension trestle ladders, stepladders and telescoping ladders that come equipped with jacks. the plank features positive stops that prevent it from over-extending. the spacer guides on the werner aluminum extension plank are made from molded thermal plastic to ease opening and closing. it is made from 2-inch, deep box cross-section extrusions and has a heavy flange on its end that acts as a handle for easy operation and rigidity. the outer flange has an open design to accommodate the jack clamps on a ladder. aluminum rivets hold its extruding cross-members in place by aluminum rivets. the werner aluminum extension plank's locking mechanism allows it to extend in 12-inch increments. it has a load-carrying capacity of 250 pounds. california proposition 65 warning. features plank expands from 10-ft to 17-ft for use on stepladders, telescoping multi-ladders, extension trestle ladders and extension and single ladders equipped with ladder jacks made of 2-in deep box section extrusions extruded cross member riveted with solid aluminum rivets positive stops prevent over-extending molded thermo-plastic spacer guides for easy open/close action outer flange open for ladder jack clamps locking mechanism sets the plank in 12in increments heavy end flange/handles for rigidity and ease of operation specifications acme tools brand name werner acme tools part number pa210 acme tools supplier bullet 1 in store pick up pricing may vary adjustable yes ansi approved yes ansi ladder rating not rated assembled weight (lbs) 56.5 base spread (in) 0.0 base width (in) 0.0 california proposition 65 warning required no country of origin china csa certified no duty rating (lbs) 0.0 globaltradeitemnumber (gtin) 00051751016505 hand crank no interchangeable parts no internal supplier part # pa210 internet product code (ipc) 1c81a45b053 jack mechanism no ladder length (ft) 10.0 ladder material aluminum ladder type scaffold manufacturer warranty na material no maximum load (lbs) 250.0 meets ansi or osha standards yes osha approved yes package depth 0.2 package height 10.0 package weight 56.5 package weight (lbs) 56.5 pump jack mechanism no rail material no scaffolding type planks self locking yes upc 051751016505 weather resistance no weather resistant no