Since MAX Co Ltd. invented the first battery-powered rebar-tying tool in 1993, rebar-tying tool technology has improved in many ways over the past two decades. The battery platform has changed from Ni-Cad to Lithium-Ion, enabling the latest model tool — the TwinTiers — to form 4,000 ties per charge. Since its launch in 2007, the RB655 has been the tool with the largest rebar-tying capacity, tying up to #8 on #9 rebar combinations. However, in 2019 MAX introduced the RB611T TwinTier, which can tie from #5 on #5 to #9 on #10 rebar, making it the battery-powered rebar-tying tool capable of tying the largest-sized rebar on the market.
Many contractors working with larger rebar applications are utilizing the large capacity of the RB611T to finish rebar tying faster. The TwinTier platform ties at approximately ½ sec per tie due to its dual-wire feeding mechanism. It also uses less wire per tie because of the wire pull-back mechanism (yields approx. 200 ties per spool when tying #5 on #5).