Want to know how to get a six pack fast? Even the best ab rollers don't look like a serious piece of fitness equipment, yet they are one of the most powerful tools you can utilise to build a killer six pack and a rock-solid core.

When setting up a home gym, you will probably want to invest in some dumbbells or kettlebells, potentially a weight bench and maybe – if you are being serious about weight training – a barbell. But you should also get an ab roller, because not only it doesn't cost much to buy one, but doing ab rollouts are probably the best core exercise ever.

You'd think you can just buy any ol' ab roller off Amazon and it will do just fine. However, you want to be a bit more thorough before you purchase one.

Surprisingly, there are a lot of different versions of ab rollers you can choose from. Some are straightforward like the Gallant Ab Roller, others, like the Perfect Fitness Ab Carver Pro or the SuperV Ab Roller lets you steer them sideways so you can train your obliques, too. And there are the SKLZ Core Wheels which look like little dumbbells with wheels and you can use them for lateral movements too.

You want to pick a robust ab roller with a high tensile-strength core. Also, the handles need to be ergonomic and padded, ideally, so your palm won't ache after each session. Some ab rollers come with foam knee pads as well so your knees won't get too abused during the exercise.

The carbon steel spring mechanism of the Perfect Fitness Ab Carver Pro provides some resistance when rolling out and some assistance as you roll back in. The wide wheels have a spherical property to them so you can move slightly sideways with them. This works your oblique muscles as well as your lower back and abs.

The handles not only look funky but are also ergonomic and padded for extra comfort. You will be pretty pre-occupied trying to engage your core, you don't want to worry about blisters on your palm, do you?

The Ab Carver Pro includes a knee pad and a downloadable 21-day workout plan so you can start working on your core muscles straight away when the parcel arrives.