What size do you need? Many experienced carpenters use a 16 oz. claw hammer for most jobs, but also carry a 20 or 22 oz. framing hammer for their heavier nailing jobs requiring big spikes. For lighter work, a 13 oz. curved claw hammer can be useful. Even a 7 oz. hammer will come in handy for smaller jobs like making picture frames.
When you read product labels, look for signal words. Signal words are found on labels of new products and let you know how toxic a product is. Older products in your home may not list signal words. Drugs and personal care products are not required to list them, although many are hazardous.
Poison – highly toxic
Danger – extremely flammable, corrosive, or highly toxic
Warning – moderate hazard
Caution – mid/moderate hazard
No signal word – not hazardous