Splicing Kit 1/4 Inch With Polymer Block, Leader Tape, and Splicing Tape Color:GRAY and the 45 degree cut

and the 45 degree cut is for splicing within the tape itself

and place on your splice

We use these knives religiously for editing and they're highly recommended and a good product

you get one USA Made stainless steel triple facet cut media edge razor blade included so you do not have to run out and find one

When buying a splicing block

Splicing Kit 1/4 Inch With Polymer Block, Leader Tape, and Splicing Tape Color:GRAY and the 45 degree cutOpen Reel Audio 1 4" Splicing Kit with USA made TMES15NP Splicing Block, 250 FT Leader Tape, Splicing Tape, and Stainless Steel Media Blade Product Description: Includes 1 each TME S15NP Polymer Two Chamfered Cross Cut Splicing Block, 1 each AC1S Series 82 Foot Roll of Splicing Tape, 1 each AC1LWH250 250 Foot Pancake of Opaque White Leader Tape, One USA Made GEM Stainless Steel Triple Facet Cut Media Blade Block has Polished Proprietary Curved Center