You need a chair/bench. One set of dumbbells.
15-20 Bench Dips. The closer the feet to your body, the easier you can make this exercise. You can place a DB on your lap for more of a challenge.
12 ea. arm. Renegade Rows. Extend from the elbow. *ADDED bonus on this one, your core is engaged the entire move.
30 Seconds or 12 reps. Tricep push-up to Pike.
10 reps, both arms working at once. Switch legs. Repeat. One Leg Tricep Kickbacks.
4 to 5 Rounds would be great.