Cali Bamboo Fossilized 12 in x 48 in Boardwalk Prefinished Bamboo Stair Tread Cordless Impact Driver Stroke adjustment dial regulates engraving GlueCore Stroke adjustment dial regulates engraving depth from fine lines to deep grooves Light and compact design provides comfortable use for precision engraving performance Letter and number template helps etch words and numbers Soft grip adds extra comfort and control Replaceable carbide point lets you engrave on most surfaces Optional 9929 diamond point (not included) for heavy duty use on hard surfaces Decorate metal 8 GPM flow rate to promote water conservation without sacrificing performance prefinished Length 48 in Width 11 13 16 in Thickness Height Approx long‑lasting step surface