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Although a single paddle keyer also utilizes separate contacts for dits and dahs, there is no ability to make both contacts simultaneously by squeezing the paddles together. Iambic keying by squeezing the paddles together creates alternating dits and dahs. This is supposed to increase speed and create a convenience or ease in sending cw. Although a single paddle keyer also utilizes separate contacts for dits and dahs, there is no ability to make both contacts simultaneously by squeezing the paddles together. Iambic keying by squeezing the paddles together creates alternating dits and dahs. This is supposed to increase speed and create a convenience or ease in sending cw. For sending Morse at speeds greater than 20 to 30 wpm the straight key becomes impractical. The iambic key becomes one viable option for the speed keyer. ==Right or Left Hand Key==Single lever keying is sometimes called slap keying since you can only depress either the dit (slap to the right) or dah (slap to the left). If you use a dual lever keyer such as an Iambic keyer only slapping to the left or right, then you are slap keying. This is fine, however, it does not utilize the "iambic" functionality of the key.Single lever keying with a bug is sometimes called slap keying since you can only depress either the dit (slap to the right) or dah (slap to the left). If you use a dual lever keyer such as an Iambic keyer only slapping to the left or right, then you are slap keying. This is fine, however, it does not utilize the "iambic" functionality of the key.The single paddle keyer is called a bug, which is mentioned above. Users of the bug tend to use a slapping action, also mentioned above. However, those learning to use an iambic paddle are encouraged not to slap the paddles. Just a light touch is all it takes if you have it adjusted correctly. If the paddle moves around the table while you are sending then you are using too much force.