20155_fingersalternate_speciesanimated_skeletonarm_spikesbisectedblack_and_whitebonedigital_drawing_(artwork)digital_media_(artwork)elbow_spikesendoskeletonfingersfull-length_portraitgearhammerholding_hammerholding_objectholding_sledgehammerholding_toolhornhumanoidmachinemalemonochromeportraitrib_cagerobert_bumarorobotscp_foundationshoulder_spikesside_viewsilhouettesimple_backgroundskeletonsledgehammersolospikesspikes_(anatomy)spinesunnyclockworktoolsundeadvertebraewhite_background