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A tray held by a stair adaptor for securing the tray either on a stairwell or on a work bench. A first slidable arm and a second slidable arm each have an adaptor leg extending downward therefrom, wherein the first adaptor leg and the second adaptor leg are sized to be accommodated within a pair of

A tray held by a stair adaptor for securing the tray either on a stairwell or on a work bench. A first slidable arm and a second slidable arm each have an adaptor leg extending downward therefrom, wherein the first adaptor leg and the second adaptor leg are sized to be accommodated within a pair of parallel clamping members of a workbench. The first slidable arm and the second slidable arm include a mating member upstanding therefrom, the mating member shaped substantially similar to a shape of each of the slots on an underside of a tray body and configured to slidably engage with at least one of the slots, wherein the first slidable arm penetrates the right side of the stair adaptor and the second slidable arm penetrates the left side of the stair adaptor to level and secure the tray body on a stairway or workbench.

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1. A tray, comprising: a tray body having a front, a back, a right side, a left side, and an underside;multiple slots defined within said underside of said tray body, wherein said multiple slots include a pair of front slots proximate to said front and a pair of central slots central to said tray bo

1. A tray, comprising: a tray body having a front, a back, a right side, a left side, and an underside;multiple slots defined within said underside of said tray body, wherein said multiple slots include a pair of front slots proximate to said front and a pair of central slots central to said tray body, wherein upon placement of said tray body on an upper step of a stairway said stair adaptor engages only said front slots and levels said tray while said adaptor base rests on an adjacent lower step, and wherein upon placement of said tray body on a workbench said stair adaptor engages only said central slots to prohibit said tray body from sliding off said workbench;a stair adaptor, further comprising: a first slidable arm and a second slidable arm;a first adaptor leg extending downward from said first slidable arm, and a second adaptor leg extending downward from said second slidable arm, wherein each said first adaptor leg and said second adaptor leg are sized to be accommodated within a pair of parallel clamping members of a workbench;each said first slidable arm and said second slidable arm including a mating member upstanding therefrom, said mating member shaped substantially similar to a shape of each of said slots and configured to slidably engage with at least one of the slots on said underside, wherein said first slidable arm penetrates said right side of said tray body and said second slidable arm penetrates said left side of said tray body to level and secure said tray body on a stairway or workbench. 2. The tray of claim 1, wherein said first slidable arm comprises a first stopping edge upstanding from a first outermost end and said second slidable arm comprises a second stopping edge upstanding from said second outermost end. 3. The tray of claim 1, wherein each said first adaptor leg and said second adaptor leg have defined therein at least one groove on one leg side thereof. 4. The tray of claim 1, further comprising a locking bar having a locking bar front, a locking bar rear, two locking bar ends and a pair of leg holes, each said leg hole defined through said locking bar proximate to each said locking bar end such that said locking bar can be slid over said first adaptor leg and said second adaptor leg to secure said first slidable arm and said second slidable arm. 5. The tray of claim 4, further comprising a handle attached to said locking bar at one of said locking bar ends. 6. The tray of claim 4, wherein each said leg hole has a leg hole edge for engaging a respective one of said grooves of said first adaptor leg and said second adaptor leg such that said locking bar can be slid over said first adaptor leg and said second adaptor leg and pushed laterally into said grooves to further secure said first slidable arm and said second slidable arm. 7. The tray of claim 4, wherein said locking bar has a front lower lip projecting from said locking bar front and rear lower lip projecting from said locking bar rear. 8. The tray of claim 1, further comprising at least one utility recess defined within said tray body; a roller tray defined within said tray body traveling from said front to said back; a front cut-out defined along said front; and multiple side cut-outs. 9. The tray of claim 8, wherein one of said side cut-outs is defined within said right side of said tray body and another of said side-cut outs is defined within said left side of said tray body. 10. The tray of claim 1, wherein said stair adaptor further comprises a base; a pair of tubular leg seats upstanding from said base; and wherein each said first adaptor leg and said second adaptor leg is configured to be received within each said tubular leg seat.